HomeMy WebLinkAbout2008-05-20 ENR Packet
AGENDA
CITY OF MAPlEWOOD
ENVIRONMENTAL AND NATURAL RESOURCE COMMISSION
Tuesday, May 20, 20118
5:15 to 6:45 p.m.
Council Chambers - Maplewood City Hall
1830 County Road BEast
10 Call to Order
20 Roll Call
30 Approval of Agenda
40 Approval of Minutes:
ao April 21, 2006
50 New Business:
ao Silver Lake Improvement Association - Request for Herbicide Treatment Funding
for the Control of Curly Leaf Pond Weed and Eurasion Watermilfoil in Silver Lake
60 Unfinished Business:
ao Rules of Procedure
70 Visitor Presentations
80 Commission Presentations
90 Staff Presentations
a. Resolution of Appreciation for Margaret Behrens, John Mason, and Tom Moibi
bo Comprehensive Plan Open House (May 22)
Co Maplewood Nature Center Report
do Maplewood Nature Center Programs
100 Adjourn
MEMORANDUM
TO:
mOM:
SUBJECT:
DATE:
Environmental and Natural Resources Commission
Shann Finwall, AICP, Environmental Planner
Rules of Procedure
May 16. 2008 for the May 20 ENR Commission Meeting
INTRODUCTION
The ordinance establishing the Environmental and Natural Resources (ENR)
Commission was adopted by the city council on September 11, 20060 The ordinance at
section 18-185 states that the commission shall elect its own officers, establish meeting
times, and adopt its own rules of procedure to be reviewed and approved by the city
council (Attachment 1)0 Rules of Procedure will help the ENR Commission facilitate the
conduct of meetings and reduce the risk of mishandling important matterso Rules
usually cover issues like the place and time of regular meetings, the order of business,
parliamentary rules governing procedure, and minuteso To date the ENR Commission
has not established Rules of Procedureo
BACKGROUND
April 21, 2008 the ENR Commission reviewed draft Rules of Procedure. The
Commission voted to adopt the portion of the Rules which were discussed at the
meeting, and requested that the remaining sections come back for reviewo
DISCUSSION
Adopted Rules
Attached for review are the sections of the Rules of Procedure that the ENR
Commission discussed and agreed upon at the April 21 meeting (Attachment 7). The
sections were as follows:
. Meetings
. Quorum
. Duties of Chairperson
. Chairperson and Vice-Chairperson
. Vacancies
. Appointments
. Public Works Department
. Agenda
. Amendment or Suspension of Rules
. Rules of Order
Election of Chair and Vice Chair
The commission requested a section in the Rules covering the election of chair and vice
chair. The commission was not able to complete this discussion and requested that it be
continued. Following is a recap of some of the suggested language tor this section:
. Commissioners should appoint their choice for chair and vice chair. Those
commissioners should then be voted on by the majority at the first meeting of
each year.
. Commissioners should give a five minute speech as to why they want to be a
chair or vice chair prior to the election.
. Commissioners should announce their desire to run for chair or vice chair in
December.
Roberts Rules of Order states that it is customary to nominate one or more candidates
for the chair and vice chair. The nomination need not be secondedo When the
nominations are complete the commission should proceed to an election, unless the
Rules of Procedure prescribe a method. The usual method is by ballot, the balloting
being continued until the offices are all filled.
Background Information
Attached for review once again are the are the Portions of the League of Minnesota
Cities' 2008 Handbook for Minnesota Cities, Planning Commission Rules of Procedure,
Community Design Review Board Rules of Procedure, City Council Appointment Policy
for Commissioners, and Robert's Rules of Order (Revised) Parliamentary Motions
Guide.
RECOMMENDATION
Review the attached ENR Commission draft rules of procedure (Attachment 7) and be
prepared to comment and make a recommendation on the document at the meeting.
Once approved by the ENR Commission, the rules of procedure must be approved by
the city council.
P:\works\environmental\environmental commission\rules of procedure memo (2)
Attachments:
1. Environmental and Natural Resources Ordinance
2. Portions of the League of MN Cities' 2008 Handbook for Minnesota Cities
3. Planning Commission Rules of Procedure
4. Community Design Review Board Rules of Procedure
5. City Council Appointment Policy for Commissioners
6. Robert's Rules of Order, ReVIsed, Parliamentary Motions Guide
7. Draft ENR Commission Rules of Procedure
Attachment 1
MAPLEWOOD CODE
DIVISION 4, ENVIRONMENTAL AND NATURAL RESOURCES
C01\;lMISSION
Sec. 18,180, Established
The city council establishes for the city an environmental lmd natural resources
commission as an advisory board to the city council, as provided in Minn. Stats. ~~
462.351-462.365.
(Code 1982, ~ 25-17)
Sec. 18- J 81. Advisory body; exceptions
All actions of the advisory environmental and natural resources commission shall be in
the nature of reeommendations to the city council, and the commission shall have no final
authority about any matters, except as the council may lawfully delegate authority to it.
(Code 1982, ~ 25-18)
State law rcference- City environmental and natural resources agency to be advisory,
except as otherwise provided by state statute or charter, Millli. Stats. ~ 462354, subdo 1.
See. 18.182. Composition; appointment; qualifications; terms
(a) The environmental and natural resources conunission shall have seven members
appointed by the counciL The members shall be residents of the city and may not
hold an elected city public offiec. When possible, the council shall select
commission mcmbers to represent the various areas of the city and to help meet the
nceds of the residents.
(b) The city cOlU1cil shall appoint members of the environmental and natural resources
commission for three-year terms. If the appointment is to fill a vacancy, thc
appointment would be to finish the unexpired part of the vacated terms.
(Code 1982, ~ 25-19)
Sec, 18.1 83, Chairperson and vice-chairperson,
The environmcntal and natural resources COlllillissiol1 shall elect a chairperson illld a
vice-chairperson at the first environmental and natural resourccs commission meeting in
January each year. The chairperson shall be responsible for calling and presiding at
meetings and shall have illl equal vote with other members of the commission. If the
chairperson is not at a meeting, the vice-chairperson shall assume the duties ofthe
chairperson for that meeting. If the chairperson resigns from or is otherwise no longcr on
the environmental and natural rcsources commission, the vice-chairperson shall become
the acting chairperson until the environmental and natural resources commission can hold
an election for new officers.
(Code 1982 ~ 25-20)
Sec. 18.184. Vacancies,
(a) ,Any of the 1,)lIowing may cause the otlice of an envimnmental and natural
reSOlUTes cortunissioncr to beconlc vacated:
(I) Death or removal Ihml the city
(2) Disability or failure to serve, as sbown by failure to attend three meetings in
any ycar, may be cause Cor removal by council majority, lmlcss good cause
can be shown to the council.
(3) Resignation in writing.
(4) Taking public of1ice in the city.
(b) Vacancies shaU be fi1Jed by the council Ii))" the unexpired portion of the vacated
term.
(Code 1982, S 25-21)
Sec. 18.185. Officers; meetings; rules of procedure.
(a) The envirOlilllental and natural resources eonunission shall elect its own officcrs,
establish meeting times, and adopt its OVv11 rules of procedure to be reviewed and
approved by the city council.
(b) AU meetings of the environmental and natural resources commission shall be
open to the public and published on the city's websiteo
(Code 1982, S 25-22)
Sec. 18.186. Duties and responsibilities.
In order to protect, preserve and enhance the environment of the City of Maplewood, the
Envirolunental and Natural Resources Commission will:
(1) Establish environmental priorities for the city in partnership with the City Council.
(2) Recommend to the Community Design Review Board, Planning Commission and
City Council changes necessary to existing policies, opcrating procedures and
ordinances that control, protect, preserve and enhance the city's environmental assetso
(3) Recommend to the Community Design Review Board, Planning Commission and
City Council new policies, operating procedures and ordinances that control, protect,
prcserve and enhance the city's environmental assets.
(4) Actively participate in and support the mission and goals of the Mapkwood Nature
Center and Neighborhood Prescrves by promoting environmental awareness through
educational programs, comm\ll1ications and co-sponsored activities.
2
(5) Pro-actively promote greater use and appreciations of the city's environmental assets.
(6) Review the role of other city groups and how they might assist, support and advise
the Environmental and Natural Resources Commission.
(7) Sponsor cnvironmental projects to enhance, repair, replace or restore neglected or
deteriorating environmental assets of the city.
(8) Develop educational programs and materials that I()ster the mission to the
Environmental and Natural Resources Commission.
(9) Develop and promote the use of "sustainable practices" for city policies and
procedures. (Code 1982, S 25-23)
See, 18.187. Compensation; expenses.
All members of the environmental and natural resources commission shall serve
without compensationo Howcver, approvcd expenses of the environmental and natural
resources commission shall be paid from available city funds.
Sec. 18,188. Responsibilities of the Environmental Manager.
Subject to the direction orthc city manager, the environmental and natural resources
commission and its chairperson, the environmental manager who reports to the city
engineer shall:
(l) Conduct all correspondence 0 rthe commi ssion.
(2) Send out all required notices
(3) Attend all meetings and hearings of the commissiono
(4) Keep the dockets and minutes ofthe commission's proceedings.
(5) Keep all req uired records and files.
(6) Maintain the files and indexes orthe commission.
(Codc 1982, S 25-25)
See, 18.189. Duties of city engineer, city attorney and other eity employees.
(a) The city engineer and the eity attorney shall be available to the environmental and
natural resources commission. The city engineer and attorney shall have the right
to sit in with the commission at all meetings, but shall not be entitled to vote as
members ofthc commission.
(b) All city engineering department employces and other regular employees or
personnel of the city shall cooperatc with the enviromnental andnatmal resources
commission and make them self available and attend meetings when requested to
do so.
(Code 1982, S 25-26)
0'
~
This ordinance shan be effective on October L 2006.
Passed In'. the City Council of the City of MaplewQod on this 11"'-- clew of Seplembcl:,
;;:ilQ(~
Diana Longrie, Mayor
ATTEST:
Karen Guilfoile, City Clerk
4
1'\1i11n Stat q 412.])1. ~l!b(12
SlaW 1'. Occhino, 572 ['1.\\l2d
316(lvl11111 ('t .App. 1997)
Minn. Slal. * 412.191, sLlbd. 2.
See Afel.'lillgs alCity COllncil.\'.
LMC InfonnaLiun Memo, Aug.
2007 fOT suggested bylaws and
other rules ofproccdure.
7:20 HANDBOOK FOIl. MINNESOTA CITlE.S
This cnapterlast revised 41':)/2008
Attachment 2
CHAFTEK 7
F. Maintaining order
Although meetings l'YllIst be open to tbe puhlic, individuals \\'ho are noisy or
unruly do not have the right to remain in coum:il chambers. V/hen
individuals abuse thclf right to be present in the council chamber, the
mayor, as presiding officer (subject to being overruled by the council),
should order their removal from the room, If the presiding officer fails to
act, the council may ~ by motion, issue such an order. The council has
authority to preserve order at council meetings, 'The council can us\:
necessary force, including use of the marshal or police, to carry out the
mandate. 1 f a person is excluded from a meeting, the council should
provide an oPP0l1unity for the excluded person to give his or her
interpretation of the exclusion to a designated city staff member to satisfy
any due-process concerns.
lfthe entire audience becomes so disorderly that it is impossible to conduct
a meeting, the mayor should declare the meeting continued to some other
time and place. The council may also move for adjournment. No matter
how disorderly a meeting may be, it is a legalllleeting and any action the
council takes in propel' form is valid, The council cannot issue contempt
citations against individuals whose disorderly conduct disrupts 01' interferes
with the transaction of city business.
G. Rules of procedure
The city council has the power to regulate its own procedure. \Vhile lllany
councils operate without written rules or regulations, written rules facilitate
the conduct of city business and reduce the risk of mishandling important
matters.
Council bylaws usually cover issues like the place and time of regular
council meetings, the order of business., parliamentary rules governing
council procedures, minutes, and standing and special c.ommittees,
1. Agendas
The bylaws should establish an order of business and a process for placing
items on an agenda. Many councils have found the following order of
business convenient:
. Call to order
. Roll call
. Approval of minutes from previoLls meeting
fl Consent agenda
tI Petitions, requests, and complaints
o Reports of officers, boards, and committees
~ RepOli,s 1r01'n staff and admini::-:trative officers
;,} Ordinances and resolutions
. Presentation of claims (The authorization for paying city claims and
bills are often included in the consent agenda.)
'<! Unfinished business
o Nev\" business
. Miscellaneous announcements
. Adjournment
2. Consent agenda
By resolution or through bylaws, a council may establish a consent agenda
containing routine, non-controversial items that need little or no
deliberation. '1'he derk or the person responsible for placing items on the
agenda prepares the consent agenda. By a majority or higher vote, the
council can approve all actions on the consent agenda with one vote. If a
councilmember objects to an item being placed on the consent agenda, it
should be removed and acted on as a separate agenda item.
3. Tips for shortening meetings
In addition to the consent agenda, councils may consider the fo11awing
suggestions to shorten meetings.
Council bylaws may set a closing date for placing items on the agenda. For
example, the clerk must receive all requests to include items on the agenda
five days before the meeting. This is especially important if
eouneilmembers need to review written material before the meeting. The
couneilmight make an exception in emergency situations by a unanImous
vote, for example. The council should set a definite time for adjournment
and observe this rule.
At some time during the meeting, often at the beginning, many city
councils establish a specific time when citizens can present concerns to the
council. In such an open forum, the mayor OJ' presiding offLCCl' should allot
a limited time for each perSall who wishes to speak. No action should be
taken all any of the issues raised. Rather, if appropriate, the issues should
be placed on the agenda of a future council meeting.
HANDDOOK FUK l\.11NNESOTA CITIES
7:21
This d1l\p\er last revised 4/9/2008
r.,.1inn.Stat.*412.191 subd.2
(authorizing the city council to
regulale iLsown procedure).
7:22
CH.!..PTER 7
When the council is going to discuss a major public isslle, the bylmvs or the
council, by resolution, may allot a limited, specific nmount of time for eacb
side to express its view;.;, The council may also follov.... this procedure for aU
items 011 the agenda.
H. Parliamentary procedure
Parliamentary procedure is a system of rules that aid in transacting
business. 'file rules are designed to prescP;lc ordel'~ expedite business, and
pl'Otect the rights of those involved in making decisions. The mayor, as
presiding officer, is responsible for guarding against abuse of the
procedures. The effective use of parliamentmy procedures is the joint
responsibility of the mayor and all councilmembcl's.
Parliamentary rules can be very simple or very complex. The complexity of
rules should vary in direct ratio to the sizc oftlle group. As the number of
people in the group increases, the complexity of the rules should increase.
Accordingly, the rules for city councils should be simple. Any attempt to
introduce a high degree of formality into the proceedings of a city council
will probably reduce its ability to operate cffectivelyo
The rules of parliamentary procedure apply to council proceedings only if
the council formally adopts such rules in its bylaws. The New Roberts
Rules of Order, Revised is designed for meetings of large bodies. Rather
than adopt these rules as a formal procedure to always follow, a council can
agree to informally follow thc rules while conducting meetings. An
informal application of the rules, together with the common sense of
councilmembers, may be the only guidelines many councils need in order
to conduct their business in an orderly manner. If a controversial discussion
is about to ocem, the mayor or a councilmember could move to adopt more
forma! rules for that particular discussion.
The follo\ving discussion introduces a few rules of pari iamentary procedure
that can simplify the work of the council. The rules are contained in The
New Roherl" Rules of Order, Revised. The council can adopt them by
inserting the following clause in lhe bylaws: "In all points not covered by
these rules, U1e council sball be governed in its procedure by The New
Roberts Rules a/Order, Revised (or some olber similar code of
parliamentary procedure)."
[lA,-<DI300K FOR IV1INNESOTr\ CITIf'.S
This chapter Jasl revised 4/9/2008
1. Motions
See /vleelings qj'CilY ('olltlcils
J )"lC lnfonmilion hfcmo; Aug
2C07 fur more il1formJ.:ion
The council transacts business through motions made by COlll1cilmcmbers.
These motions are seconded, at times, and subsequently passed or rejected
by council vote. Each motion has different rules, For example; councils can
debate some motions \vhiJe tbey must vote on others immediatdy. Smne
motions require a simple majority for passage; others need a iV\ro-thirds
majority.
These are the typical steps to make and act on a Illotion:
<<ll A member of the council addresses the presiding officer.
6 The presiding officer recognizes the member.
. The councilmember states his or her motion. (Usually in the following
form: "I move. . . text of the motion,") A motion should always be in
positive, rather than negative, terms. For example, if the motion is to
deny X a permit, and the council defeats the motion, there may be some
confusion as to whether or not X has been granted a permit. Even if the
consensus of the council is to deny the permit, the motion should be to
grant the permit and the council should then vote it down. The
councilrnember making a motion does not need to favor it or vote for it.
The councilmember may wish to put the issue before the council so a
decision can be made,
. If necessary, another councilmember then seconds the motion by
saying: "I second the motion." (Seconds are not needed for meetings of
small bodies like city councils unless required in the bylaws.) Neither
making a motion nor seconding a motion places it before the council.
Only the presiding officer can place the motion before the council by
stating the motion.
. The presiding officer repeats the motion or states the question to the
counciL (When the presiding officer has stated the question, the motion
is pending, and it is then open to dcbateo)
. A discussion follO\vs, if the motion can be debated,
. A councilmember may make subsidiary motions in the same form as
the original motion.
. The council votes on the original motion or on any or the subsidiary
motions.
. The presiding officer announces the result of the vote on each motion
immediately after the vote count is complete.
. A councilmember may not make a second main motion while the
council is discussing the first one.
[lANDI-WOK fOR M1NNESOTA CInES 7:23
This chapter li1st revised 4/9/2008
7:24
CHAPTER 7
~ Any councilmember rnay, however, make a priv ileged motion even if 3
main motion is currently before the council, ^ privileged motion is one
to adjourn, to ret:et.s, or to ask a question ofpriv!lege---such as to
restate the motion or ask for order. In this case, a_ vote on the pdvileged
motion precedes the one on the main motion.
2. Role of the presiding officer
In any group or assembly, the presiding officer has an extra measure of
pO\ver. As the chair of the meetingJ the presiding officer is responsible for
guiding the group toward the conclusion of pending business in good time,
while also giving major issues enough consideration. To accomplish this,
the presiding officer bas two special powers:
. The first power is to interpret and apply the rules of procedure. The
presiding officer must decide whether motions are proper and in order,
whether the body should grant questions of special privilege, and what
procedure is proper in any given instance. The presiding officer should
maintain order and expel disorderly individuals from the meeting.
. The presiding officer does not have complete freedom in exercising this
authority. Any member of the council may appeal the decision of the
chair. To do this, a council member mLlst say, "I appeal the decision of
the chair," immediately after the chair announces the decision.
(Recognition from the presiding officer is not necessary when making
an appeaL) The appeal must he seconded, is debatable, and cannot be
amended. After the debate, the assembly votes on the chair's decision.
A majority of "yes" votes upholds the decision of the presiding officer,
and a majority of "no" votes overrules the decision. A tic vote sustains
the ruling. The presiding omcer may vote to uphold his or her own
ruling. Ifno one appeals a l'Uling as soon as the presiding officer makes
it, it becomes the rule of the council.
. The presiding officer's second power is to recognize speakers. The
presiding officer may not, however, refuse to receive a motion after
recognizing the maker, nor refuse to call for a vote on any motion that
has been properly made and seconded. The power to recognize
speakers still gives the presiding officer considcrable influence over the
course of the discussion and, consequently, over the eventual decision
on any matter. When the council invites comments from the audiencc,
the presiding officer continues to recognize speakers.
Hi\NDIJOOK FOR fvllNt'WSOT/\ CITIES
This chapter last re\'is~d 4/912008
In statutory cities, the tnayor, who is the presiding officer~ plays a dual role,
The mayor presides, makes and seconds motions, and ;/otes on all questions
befDre the council. The m.ayor usually steps down from the position as chair
in orcle!' to make a rnotioo. To do this, the rna.yor turns over the duties of
presiding office!' to a member of the counciL The rnayof may then make a
motion, and should not assume the dutie~;; as presiding officer until the
council h8s taken a final .,/ote or postponed the motion until another time.
3. Special motions
Several motions deserve special consideration. 'fhcy include thefoliowing:
a. The motion to reconsider
This motion enables a council to set aside a vote it previously took, and to
reconsider thc matter as though it had not voted on the issue. If the council
uses The New Roberts Rules of Order, Revised, only a persoll who
originally voted on the prevailing side may move to reconsider. Othervvise,
any member may make the motion by saying, "1 move to reconsider. . .
stating the motion to be reconsidered. . ," The council may debate the
motion, If the council passes the motion to reconsider, it must then
reconsider the original motion and take another vote. If the council defeats
a motion to reconsider, no further action is necessary.
b. A motion to postpone indefinitely
There is an impOlianl difference between the motion to postpone
indefinitely and the motion to postpone temporarily. The motion to
postpone temporarily is more commonly called a motion to "lay on the
table" or "to table." The motion to postpone temporarily, postpones
consideration orthe motion until some undetermined, future time. The
council may consider a tabled motion whenever a majority orthe members
decide to do so. A motion to postpone indefinitely, however, is the
equivalent to a negative vote on the main motion. An affirmative vote on it
may be reconsidered, but not a negative vote. A motion to permanently
suppress any future consideration of an issue is not binding on a future
council.
c. A motion to limit debate
A council may limit debate by placing a time limit on it, such as a limit of
15 minutes to consider a pmiicular motion; or limiting the number of
people who may speak for and against a celiain 111otionl such as a limit of
three speakers in favor and three speakers opposed.
llAI\DHOOK FOR MrNNESOTA CITIES
7:25
This chapter last rc:viscd 4/9/2008
Minn. StaL. * 13D.OI, subd 4.
Minn. Stat. ~ 1.112.U2, slIbd.la.
CHAPTER 7
;;1. The motion to amend
CouncHmembcrs may ofter amendments to a rrmin rm)tion at any time. 111
additionJ it is possible to amend an amendment currently under
consideration. Beyond this, Gouncilmembers can offer no further
amendments. 'W'hen a member has made a motion to aIYlcndl the vote on the
amendment must precede the vote on the original motion. After the council
has accepted or rejected the amendment, another vote on the original
motion is necessary,
e. The motion to substitute
This is a motion to replace one motion \\'ith another on the same subject. A
councilmember may move to substitute a main motion or an amendment to
a main motion. One form for making a substitute motion is to saYl "I \vish
to introduce the following substitute motion. . . present the substitute
motion. . ." When a substitute motion is before the council, the council
must decide which of the 1\;\'0 motions, the original motion or the substitute
motion, to consider. The council must vote on the question. A "yes" vote
favors considering the substitute motion. A "no" vote favors considering
the original motion. The council must then discuss and vote on the selected
motion.
I. Voting procedures
State law does not regulate the process of council voting. The council may
use whatever procedures it prefers, subject to chmier provisions in home
rule chmiel' cities. The council's bylaws can include voting rules.
Otherwise, the council may use voice voting or standing voting unless a
council member calls for voting by ballot. The bylaws can also set the order
in which councilmembers vote. Whether the vote is unanimous or not, the
minutes must record the name of each councilmcmber present and his or
her vote. Occasionally councils may vote by ballot, such as when
eliminating candidates for a city position, until only two options remain.
While the law allows for voting by ballot, the procedure must ensure each
councilmember's vote is recorded in the minutes and is open for public
inspection.
J. Role of the mayor and clerk
Mayors and Standard Plan city clerks have the same powers as
councilmembers to make, second, and vote on motions. The mayor does
not have a veto, and the mayor generally may 110t vote twice in order to
break a tie. If, however, there is a tie vote in filling a vacancy in elective
office, the mayor must break the tie by making the appointment. The mayor
presides at council meetings, and the clerk keeps the minutes.
7:2fi
This chapter lust revised 4/9/2008
IIAND1300K FOR M1Nr\[SOTA CiTIES
Attachment 3
MAPLEWOOD PLANNING COMMISSION RULES OF PROCEDURE
Approved by tile Planning Commission on February 21, 1983
Revision on Febnlaly17, 1999
Revision adopted on January 3, 2005
Last Revision proposed on July 17, 2007'
We, the members of tile Planning Commission of the City of Maplewood, Minnesota, created
pursuant to Chapter 2, as amended, of the Maplewood Code of Ordinances, do hereby accept
the following Rules of Procedure, subject to the provisions of said ordinances, which are hereby
made a part of these rules:
A. MEETINGS
1. All meetings shall be held In City Hall unless otherwise directed by the chairperson, in
which case at least 24 hours notice will be given to all members.
2. Regular meetings shall be held at 7 p.m. on the jrst and third Tuesdays of each montho If
a regular meeting falls on a legal holiday, such meeting shall be rescheduled as a special
meeting, if needed.
3. Special meetings shall be held upon call by the chairperson, or in their absence, by the
vice chairperson, or by any other member with the concurrence of five other members of
the Commission. At least 48 haUlS notice shall be given to all members for special
meetings.
B. QUORUM
10 A simple majority of the current membership of the Commission shall constitute a
quorum.
2. Any member having a confiict of interest shall declare the same before discussion of the
item in which he or she has a conflict. Any member who abstains from voting on a
question because of possible conflict of interest shall not be considered a member of the
Commission for determining a quorum for the consideration of that issueo
30 Approval of any motion shall require the affirmative vote of a majority of the members
present.
C, DUTIES OF CHAIRPERSON
In addition to the duties prescribed in Section 2-249 ~ of the Code of Ordinances, the
chairperson shall appoint such standing committees and tempol8ry committees as are
required, and such committees will be charged with the duties, examinations, investigations,
and inquiries about the subjects assigned by the chairperson. No standing or temporary
committee shall have the power to commit the Commission to the endOlsement of any plan
or program without its submission to the lUll Commission.
D. ELECTION OF OFFICERS
1. A chairperson and vice chairperson shall be elected at the first planning commission
meeting ill June, and will serve until their successors 113ve been elected
20 In the absence of the chairperson, tile vice chairperson shall perform all duties required
of the chairperson. When both the chairperson and the vice chairperson are absent the
attending members shall elect a chairperson pro tern.
3. If the chairperson resigns from or Is otherwise no longer on the planning commission, the
vice chairperson shall become the acting chairperson until the planning commission can
hold an election for new officerso If the vice chairperson resigns or is otherwise no longer
on tt1e planning commission, the planning commission VIi II elect a new vice chairperson
at the next possible planning commission meetingo
E. REPRESENTATION AT COUNCIL MEETINGS
A representative from the Commission shall appear at each Council meeting, where a
planning item is on the agenda, to present the Commission's recommendation and to
answer questions from the City Council regarding the decision. The Commission shall
adopt a rotating schedule of its members at the first meeting of each year to attend these
meetings.
F. PLANNING DEPARTMENT
In addition to carrying out the duties prescribed in Section 2-254 of the Code of Ordinances,
the city planning staff shall:
1. Prepare the agenda and minutes for each meeting of the Commission.
2. Act as technical advisor to the Commissiono
3. Present written altematives and make recommendations on matters referred to the
Commission.
40 Maintain a record of all agenda items from application to final action by the City Council.
G. AGENDA
1. Copies of the agenda, together with pertinent planning office reports and copies of the
minutes of the previous meeting, shall be distributed so that the members of the
Commission shall have a copy at least three days prior to the meeting concemed.
20 The agenda shall consist of the following order of business:
a. Call to Order
bo Roll Call
c. Approval of Minutes
do Approval of Agenda
e. Public Hearings
2
f. Unfinished Business
g. New Business
h. Visitor Presentations
I. Commission Presentations
j. Staff Presentations
k. Adjournment
3. No item trlat is not on tt-Je agenda shall be considelBd by the Commissiono
H. Except as herein provided, Robert's Rules of Order, Revised and Robert's Parliamentary
Law shall be accepted as the authority on parliamentary practice.
I. Amendments to the comprehensive plan shall require that the Planning Commission follow
the same procedure for hearings and notices as required by State law for zoning
ordinances.
J. APPOINTMENTS
The city council shall make all appointments to the planning commission byfollowing the
current city appointment policy.
K. AMENDMENT
1. Any of these rules may be temporarily suspended by the vote of two-thirds majority of the
members present
20 These Rules of Procedure may be amended at any regular meeting of the Commission
by a majority vote of the entire membership and submitted to the City Council for
approval.
L. These "Rules of Procedure" shall be reviewed by the Planning Commission at the first
meeting of each year.
p:\commdvpt\pc\pcrules.2007 Juiy
3
Attachment 4
COMMUNITY DESIGN REVIEW BOARD
RULES OF PROCEDURE
We, tt10 members of the Community Design Review Board of the City of Maplewood, Minnesota,
created pursuant to Article IV. Section 25 of the Code of Ordinances, hereby adopt the following
"Rules of Procedure," subject to the provisions of said Article which is hereby made a part of
these Rules:
I. MEETINGS
A. All meetings shall be held in the council chambers in Maplewood City Hall, 1830 E.
County Road B, unless otherwise directed by the chairperson or staff, in which case at
least 24 hours notice will be given to all members.
B. Regular meetings shall be held at 6 p.m. on the second and burth Tuesdays of each
calendar month, provided that when the meeting falls on a legal holiday or voting day,
such meeting shall be rescheduled 0
Co Special meetings may be held upon call by the chairperson, or In his/her absence, by
the vice chairperson, or by any other member with the concurrence of two other
members of the board with at least 48 hours notice to all members.
II. QUORUM
A. Three members of the board shall constitute a quorum.
Bo Any member who abstains from voting on a particular question because of possible
conflict of interest shall not be considered to be a member of the board for the purpose
of determining a quorum for the consideration of the issue.
Co Any action by the board shall require a majority vote of the members present
III. DUTIES OF THE CHAIRMAN
A. In addition to presiding at all meetings of the board, the chairperson shall appoint such
standing committees and temporary committees as may be required, and such
committees will be charged with the duties, examinations, investigations, and inquiries
relative to subjects assigned by the chairpersono
Bo No standing or temporary committee shall have the power to commit the board to the
endorsement of any plan or program without the express approval of the board.
IV. ELECTION OF OFFICERS
A. The chairperson, vice chairperson, and such officers as the board may decide are
needed, shall be appointed by the board at the second meeting of each calendar year
and will serve until their successors have been duly elected and qualifiedo
B. In the absence of the chairperson, the vice chairperson shall perform the duties of the
chairpersono In the event that both are absent, the members present shall elect a
chairperson pro tem.
V. DESIGN REVIEW BOARD VACANCIES
A The following are grounds for recommending to the city council the dismissal of a
community design review board member:
1. Failure to serve, as shown by failure to attend six meetings in any calendar year,
without good causeo
20 Resignation in writing.
3. Taking public office in Maplewood.
4. Moving out of Maplewood.
VI. DIRECTOR OF COMMUNITY DEVELOPMENT
A. In addition to carrying out the duties prescribed in city ordinance, the director or a
designated replacement, shall:
1. Prepare the agenda for each meetingo
20 Act as technical advisor to the board on any matter which comes before the
boa rd.
3. Make written recommendations to the board on matters such as, but not limited
to, architectural plans, site plans, signage and landscaping proposalso
4. Inspect the construction of all projects approved by the board for plan
complianceo
5. Schedule any matter with the city council that has been reviewed by the board
that requires city council approval,
VII. AGENDA
A Copies of the agenda, together with pertinent staff reports and copies of the minutes of
the previous meeting, shall be made available to each member of the board not later
than three days prior to the next scheduled meeting.
B. The agenda format shall read as follows:
1. Call to Order
2. Roll Call
3. Approval of Minutes
40 Approval of Agenda
50 Unfinished Business
60 Design Review
-2-
7. Visitor Presentations
8. Board Presentations
90 Staff Presentations
10. Adjournmcnt
C. The board shall only consider items on the agenda,
D. The board's review shall include, but shall not be limited to, Hle bilowing items:
1. Site Considerations:
a. Utilities
b. Drainage
c. Landscaping - fence, screening
d. Traffic flow, parking and driveway access
eo Trash receptacle enclosure
f. Building setbacks
go Security lighting
h. Access for emergency vehicles
2. Architectural Considerations:
a. Materials B compatible with neighboring buildings; such as block, metal,
brick, etco, including colorso
b. Building aesthetics B compatible with neighboring buildings, scale of
building, size in relation to surroundings, flat roof vs. pitched roof, etc.
c. Location and concealment of outside equipment, e.g. air conditioning, and
outside storage yards.
VIII. AMENDMENT OR SUSPENSION OF RULES
A Any of the foregoing rules may be temporarily suspended by a majority vote of the
members present.
B. The "Rules of Procedure" may be amended at any regular meeting by a majority voteo
IX. RULES OF ORDER
Except as herein provided, Robert's Rules of Order, shall be followed.
p:com-dev\community design review board/rulesodrb
Revised: June 2004
.,
-y-
Attachrnent 5
CITY OF MAPLEWOOD
ADVISORY BOARD/COMMISSION APPOINTMENT POLlCY
The City Council will hold interviews for the commission vacancies and will makc
appointmcnts. The City Council will accept prepared questions from the advisory boards
to use dllring the interview process if provided by the appropriate board.
The chair or designee of eaeh commissien will attend the interview session and should
providc input to the City Couneil. The chair or designee will not have a vote in the
process.
The City Council will not impose tenn limits. However, they will make appointments or
re-appointments throllgh an open or commllnity wide process. When a tenn ends every
commissioner seeking re-appointment will re-apply and possibly interview again with the
City Council and any other candidates (if there are others) The Council will then have 3
options: re-appoint the existing conmlissioner, appoint a new person to a new tenn or
leave the position open to fi 11 at a later datc.
The City Council will establish a contact with each advisory board or commission. The
Council will make the appointments among themselves at a city council meeting
(generally, the first or second meeting ofthe year). The term of the contact appointment
will be for one year or another mutllally agreed upon timeframe.
The City COllncil may remove any commissioner from their board Cor un-ethical behavior
or other misconduct. Excessive absences from meetings during a year will result in an
alltomatic resignation.
Each commission will have the chair or other member attend city council meetings to
present reports on topics/actions taken at commission mcetings. This is Cllrrcntly done by
CDRB and PC and will now be extended to other commissions.
s: Com_dvpt.advisory.policy.04
Adopted May04
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Attachment 7
DRAFT
5-16-08
ENVIRONMENTAL AND NATURAL RESOURCES COMMISSION
RULES OF PROCEDURE
VVe, the member:; of the Environmental and Natural Resources Commission of the City of
Maplewood, Minnesota, created pursuant to Division 4, Sections 180180 to 180189 of the
Maplewood Code of Ordinances, hereby adopt the following "Rules of Procedure," subject to the
provisions of said Article, which is hereby made a part of these Rules:
A. APPOINTMENTS
The city council shall make appointments to the en\ironmental and natural resources
commission by following the current city appointment policy.
B. MEETINGS
1. All meetings shall be held in the council chambelS in Maplewood City Hall, 1830 E.
County Road B, unless otherwise directed by the chairperson or staff, in which case at
least 24 hours notice will be given to all commissioners.
20 Regular meetings shall be held at 5:15 p.m. on the frst Tuesday of each calendar
month, provided that when the meeting falls on a legal holiday or voting day, such
meeting shall be rescheduled.
3. Special meetings may be held upon call by the chairperson or in his/her absence, by
the vice chairperson, or by any other commissioner with the concurrence of a majority
of the commissioners with at least 48 hours notice to all commissionerso
C. PUBLIC WORKS DEPARTMENT
In addition to carrying out the duties prescribed in city ordinance the environmental planner
or a designated replacement shall:
10 Prepare the agenda for each meeting.
20 Act as technical advisor on any matter which comes before the commission.
3. Make written recommendations to the commission on matte IS referred to the
commission.
40 Schedule any matter with the city council that has been reviewed by the commission
that requires city council approval,
~ 1-
D. AGENDA
010 Copies of the agenda, together with pertinent staff reports and copies of the minutes of
the previous meeting shall be made available to each member of the commission no
later than three days prior to the next scheduled meeting.
20 The agenda format shall generally read as follows:
ao Cali to Order
b. Roll Call
co Approvai of Agenda
d. Approval of Minutes
eo Unfinished Business
f. New Business
g. Visitor Presentations
h. Commissioner Presentations
L Staff Presentations
j. Adjournment
E. QUORUM
1. A simple majority of the current membership of the commissioners shall constitute a
quorum.
2. Any commissioner who abstains from voting on a particular question because of
possible conflict of interest or other reason shall not be considered a member of the
commission for the purpose of determining a quorum for the consideration of the
issueo
3. Any action by the commission shall require a majority vote of the members present.
F. ELECTION OF OFFICERS
(To be complete)
G. DUTIES OF THE CHAIRPERSON
1. In addition to the duties prescribed in the ordinance, the chair shall represent the
commission at each city council meeting where a commission item is on the agenda,
to present the commission's recommendations and to answer questions from the city
council regarding the decision. If the chair is unavailable to attend the city council
meeting, the chair will appoint a representative from the commission.
H. CHAIRPERSON AND VICE-CHAIRPERSON
10 The chairperson, vice chairperson, and such officers as the commission may decide
shall be elected and assume duties according to the current ordinance.
-2-
20 In the absence of the chairperson, the vice chairperson shall perform all duties
required of the chairperson. When both the chairperson and the vice chairperson are
absent, the atlending members shall eiect a chairperson pro temo
3. if the chairperson resigns from or is othelwise no longer on Ule commission, the vice
chairperson shall become the acting chairperson until the commission can hold an
election for new officers. If the vice chairperson resigns or is otherwise no longer on
the commission, the commission ViAll elect a new vice chairperson at the next possible
commission meetingo
I. TEMPORARY COMMITIEES
1. The commission shall elect by a majority vote such standing commitlees and
temporary committees as may be required and such committees ViAll be charged with
the duties, examinations, investigations, and inquiries relative to subjects assigned by
the chair.
20 No standing or temporary committee shall have the power to commit the commission
to the endorsement of any plan or program without the express approval of the
commission.
J. VACANCIES
The environmental and natural resources commission positions shall be vacated or
recommended to the city council for vacation according to the current environmental and
natural resources ordinances.
K. AMENDMENT OR SUSPENSION OF RULES
1. Any of the foregoing rules may be temporarily suspended by a majority vote of the
commissioners present.
2. The "Rules of Procedure" may be amended at any regular meeting by a majority voteo
L. RULES OF ORDER
In all points not covered by these rules, the commission shall be governed in its procedures
by Robert's Rules of Order, Revised.
P:\PW\Works\Environemenlal\Environmenlal Commission\Rules of Procedure (2)
-3-
AGENDA REPORT
TO: Environmental and Natural Resources and Park Commissions
FROM: Shann Finwall. Environmental Planner
SUBJECT: Silver Lake improvement ,Association m Request for Herbicide Treatment Funding
for the Control of Curlyleaf Pondweed and Eurasian Watermilfoil in Silver Lake
DATE: May 14, 2008 for the May 20 Environmental Commission and the May 21
Park Commission Meetings
INTRODUCTION
Silver Lake is located on the far northeast section of the City of Maplewood and shares its
border with two other municipalities, North St Paul and Oakdale (Attachment 1). Silver Lake is
located in the Valley Branch Watershed District The size of the lake is approximately 72 acres
with a mean depth of 7.3 feet, and a maximum depth of approximately 23 feet A total of 35
residents and two parks have shoreline on the lakeo The parks are Silver Lake Park in North St
Paul and Joy Park in Maplewood
The Silver Lake Improvement Association (hereinafter the "association") was created to help
restore Silver Lake. The association, made up of the residents on the lake, obtained a $10,000
grant in 2007 and 2008 from the Minnesota Department of Natural Resources to treat the lake
with herbicide for the control of curlyleaf pondweed and Eurasian watermilfoiL The total cost for
treatment of the lake in 2007 was $40,000 and in 2008 is estimated at $60,000 due to a change
in state law requiring the use of Triclopyr herbicide over 2, 4 D herbicide, which was used last
year.
The association estimates that Joy Park encompasses 33 percent of the linear shoreline of
Silver Lake. As such, Dr. Mike Manthei, president of the association, has submitted a letter
requesting that Maplewood contribute 33 percent of the funding ($19,800) to treat the lake this
year (Attachment 2). The letter states that the association is committed to a five to ten-year
plan to restore the lake, and as such is requesting yearly participation from the cityo
BACKGROUND
Last spring the Environmental and Natural Resources (ENR) Commission reviewed a request
by the association for a $13,000 contribution from Maplewood for the herbicide treatment of
Silver Lake. The ENR Commission recommended approval of one-half of the request, in the
amount of $7,500 of funds from the 2007 environmental utility fund budget toward the 2007
treatment
April 9, 2007, the City Council denied the association's request for funding (Attachment 3).
DISCUSSION
Herbicide Treatment
Attached is an invoice from Aquatic Engineering, Inc, for the herbicide treatment of Silver Lake
(Attachment 4)0 The cost is estimated at $50,000 Aquatic Engineering will apply Aquathol K
tor the treatment of curlyleaf pondweed and triclopyr for the treatment of Eurasian watermiifoiL
The Minnesota Department of Natural Resources (DNR) Annual Report on Invasive Species of
Aquatic Plants and Wild Animals in Minnesota (Attachment 5) Ilas information on research
regarding control of these invasives as well as goals for management including preventing the
spread and reducing impacts to Minnesota's ecology, society, and economyo The DNR
recommends the herbicides mentioned above for the treatment of curlyleaf pondweed and
Eurasian watermilfoiL
Lake Study
The DNR funded a study to collect data on the aquatic plant community in Silver Lake following
the 2007 herbicide treatment for curlyleaf pondweed and Eurasian watermilfoiL The study was
conducted by Fortin Consulting, Inc., and includes a survey of plants before and after the
treatment (Attachment 6)0 The study found that there was a change in vegetation composition
and density between the lake treatment before the survey and after Eurasian watermilfoil and
curlyleaf pondweed declined substantially, but there was also a reduction in some of the native
plants as well,
Impaired Waters
According to the Minnesota Pollution Control Agency's (MPCA) 2008 inventory of impaired
waters, Maplewood has eight impaired waters in its borders including Kohlman, Gervais, Spoon,
Keller, Wakefield, Round, Phalen, and Beaver (Attachment n The Clean Water Legacy Act
specifies goals for implementation of cleaning impaired waters including requiring studies of
total maximum daily loads (TMDL) on lakes within the state. TMDLs are a calculation of the
maximum amount of a pollutant that a waterbody can receive and still meet water quality
standards. The MPCA inventory includes required completion dates for these studies (2008 -
2022).
Ramsey Washington Metro Watershed District (RWMWD) is conducting the studies for most if
the lakes in Maplewood. These studies will also determine the main source of pollutant loading
within a lake and set timeframes and implementation strategies for decreasing those loadso As
such, the city will see higher costs in stormwater management in the coming years to assist in
the decrease of the pollutant loads to the impaired waterbodieso
Silver Lake Condition
Eurasian watermilfoil was first observed in Silver Lake in 19920 Prior to 1992, harvesting was
employed in the lake as a means to control surface vegetation on the lake. Harvesting was
discontinued in 1992 due to the discovery of Eurasian watermilfoil. Silver Lake was chemically
treated in 1992 and 1993 with 2, 4 D in an attempt to eliminate Eurasian watermilfoil. In 1994 a
macrophyte survey was conducted and Eurasian watermilfoil was not present. Because of this,
treatment with 2, 4 D was discontinuedo Eurasian waterrnilfoil eventually returned to Silver Lake
along with curlyleaf pondweed which was discovered in 1999.
0,
Macrophytes are aquatic plants growing in or near water that are emergent, submergent, or
floatingo Silver Lake has an abundance of native macrophytes, in addition to the nonnative
curlyleaf pondweed and Eurasian watermilfolL Silver Lake is not an impaired waterbody and is
considered to have good water quality The abundance of the native macrophytes is partially
due to the good water quality" Macrophytes are beneficial to lakes because they provide cover
for fish and substrate for aquatic invertebrates They also produce oxygen, whicll assists with
overall lake functioning, and provide food for some fish and other wildlifeo However, an
overabundance of macrophytes. as seen with the nonnative rnacrophytes in Silver Lake, can
add to high nutrient levels in a lake and interfere with lake processing, recreational activities
(eogo, swimming, fishing, and boating), and detract from the aesthetic appeal of the system The
removal of nonnative macrophytes within Silver Lake, therefore, would mainly be for
recreational purposeso
Beginning in 2005, Valley Branch Watershed District brought together various stakeholders to
begin the development of a plant management program for Silver Lakeo This proposed
management plan will address and recommend solutions to improving the water quality of Silver
Lakeo The implementation plan will include discussion on the following items:
. Monitor Silver Lake on an annual basis.
. Determine how much phosphorus is entering Silver Lake and identify sourceso
. Evaluate best management practices and determine where such practices
. should be employed
. Manage macrophytes.
. Require adequate buffers.
. Investigate impacts of Eurasian watermilfoil and Curlyleaf pondweed on downstream
waterso
. Address ditch erosion and sedimentation problems at the north end of Silver Lake.
. Discuss in-lake treatment optionso
Joy Park Improvements
With respect to Silver Lake, the City of Maplewood has a great opportunity to do our part in
improving water quality with the implementation of the Master Plan for Joy Park. The Joy Park
Master Plan includes:
. Stabilize and restore the existing shoreline with native plant communities.
. Lake Links Trail and internal park trailso
. Restore open lands to prairie, wetland communities and marshes, and woodlands.
. Control terrestrial invasive plants.
. Implement best management practices to treat stormwater runoffo
. Provide picnic shelter and tot lot.
. Provide opportunities for fishing (fishing piers and platforms)o
. Invasive species signage.
The Joy Park Master Plan represents a balance between recreational uses and preserving the
park's natural values. Valley Branch Watershed District has offered funding for some of the
restoration of the wetlands and shoreline proposed in the Master Plan. In 2008 the city hopes to
install parts of the trail and begin work on stormwater and shoreline improvementso
J
Lake Associations
The city has received funding requests from other lake associations in the past for similar
treatment applicationso The city's position has been not to fund these types of requests, but to
worl< with the associations and the various watershed districts on tinding ways to reduce nutrient
loading to the waterbodieso
Kohlman Lake Association formed in order to get funding for the dredging of the lal<60 I<ohiman
lake is an impaired waterbodyo The strategy of dredging to improve water quality was proven
to be very expensiveo As such, Ramsey Washington Metro Watershed District is now funding
the herbicide and aium treatments in the lal<e Maplewood is also doing our part to assist in the
reduction of TMDLs to the lake with the Kohlman Lane Area Street improvementso The current
drainage system provides little to no treatment The street improvements include large public
rainwater gardens and small private rainwater gardens as a way to treat stormwateL This will
improve the quality of runoff to Kohlman Lake, Gervais Lake, and surrounding wetlands.
Because Maplewood now has eight impaired waterbodies in its borders, similar requests for
funding are just around the corneL The request by Silver Lake Improvement Association is a
good opportunity for the city to create a policy for these types of requests.
Other Funding and Support
The association has requested and will be receiving funding from the City of North St. Paul
($12,600) and the City of Oakdale ($3,600). They are also requesting funding from Valley
Branch Watershed District. The watershed district funded the original macrophyte study and
donated $2,945 last year for treatment of the lake. This year they have requested that the
association come to them for funding after all other sources have been exhausted. The
watershed district is struggling with the request for funding as their mission, like other watershed
districts, is to ensure water quality in the lakes and wetlands, not to ensure recreational
opportunities.
City Funding
The association is basing their request for 33 percent of the overall cost of the treatment of the
lake on their assessment that Joy Park encompasses 33 percent of the linear shorelineo Based
on GIS mapping, however, Joy Park actually encompasses 27.5 percent of the linear shoreline
(Attachment 8)0 Based on this figure and the association's request, Maplewood's portion of the
funding would be $16,5000 The association is requesting a yearly participation from the city for
the next five to ten years for amount or more each yeaL
Joy Park includes natural environments and recreational opportunities on land and wateL As
such, Maplewood should be concerned with both elements including ensuring the lake is clear
of nonnative macrophytes which could result in added nutrient levels in the lake and interfere
with recreational activities such as swimming, fishing, and boatingo The policy question for the
ENR and Parl<s Commission would be "Is funding the treatment of a non-impaired lake in a tight
budget year a wise policy when future funding of impaired lakes is imminent?"
Because of the city's parkland adjacent the lake, staff finds there is merit in the association's
request for funding by Maplewoodo However, staff is concerned with the amount and the
obligation to commit to that amount yearlyo Stormwater management is funded by the city's
environmental utility fund (EUF)o Parks management is funded by the Park Access Charge
4
(PAC)o If the ENR and Parks Commission find that funding the treatment of Silver Lake with
herbicides for the control of nonnative macrophytes is warranted, then staff would recommend
funding one-half of the city's 27.5 percent ($16,500 x .50 = $8,250) for one year and that half of
those funds come from the EUF and the other half come from PAC. Future requests would
require review by the city and wouid be based on studies the success of the treatmentso
RECOMMENDATION
Staff recommends that the ENR and Parks Commission review and make a recommendation on
the Silver lake Association's request for funding of the treatment of Silver Lake with herbicides
for the control of nonnative macrophyteso Staff further recommends that If the ENR and Parks
Commission find that the funding is warranted, that the funding be limited to one-half of the
city's 21'5 percent ($16,500 x .50 ~ $8,250) and that half of those funds come from the EUF and
the other half come from PACo Future requests would require review by the city and would be
based on studies of the success of the treatmentso
P:IPWIWorkslEnvironmentallSilver LakeI5-20-08 Memorandum
Attachment:
10
20
30
40
50
60
70
80
Location Map
Silver Lake Improvement Association Letter
April 9, 2007, City Council Minutes
Aquatic Engineering Herbicide Treatment Estimate
DNR Invasive Species Report
Fortin Consulting Aquatic Plant Survey
MPCA 2008 Draft List of Impaired Waters
Joy Park Parcel Boundary
5
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Attachment 1
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Attachment 2
80 Mo MANTHEI 0 preso
P. J. ANDERSON, vice-pres.
Po Jo SWAN, seco
The Silver Lake Improvement Association
NORTH ST. PAUL
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*
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MINNESOTA
15 March 2008
Year Two (Update)
City of Maplewood
1830 Co. Rd. BEast
Maplewood, MN 55109
Dear City Manager:
I am writing to you on behalf of Silver Lake and Silver Lake Improvement Association, Inc. in Ramsey
County. I am the President of the Silver Lake Improvement Association Inco We created this
Association to help restore Silver Lakeo Last year, we obtained permission from the MN DNR to treat
the whole lake, because of the non-native exotic invasive plants that are in this lake (Curly Leaf Pond
Weed and Eurasin Water Milfoil)o We were awarded a Grant for $10,000 last year (2007)0 We have
again been awarded a Total Lake Grant this year (2008).
We have the estimate now for total lake treatrnent based on the treatment from last year. The final
costs will be determined by the spring plant survey conducted by the MN DNR The cost of this
treatment will need to be shared by the City of Maplewood (your park on the north end), the City of
Noo St. Paul (their park on the south end), the City of Oakdale (the area of the lake adjacent to
Century Ave), and the citizens surrounding the lake (they will be asked to contribute $634-1000).
Last year, Ramsey County and Valley Branch Watershed District contributed. We will try to include
other stakeholders as they are identified to uSo
In the year of 2005, two people from our lake board measured very carefully the lakeshore perimeter.
We have divided the linear feet into a percentageo Please see the percentage listed below. This
amount (in dollars related to the cost of treatment) is the minimum participation requested. Since
Joy Park and the boat landing are in Maplewood, we would suggest a higher amount
contributed to the cost of the total lake project. Please note: the amount requested is for this
year, year two (2008). We are committed to 1:1 5-1010 year plan to restore this lake. We
respectfully request your yearly participation.
City of Maplewood:
City of No. St. Paul
City of Oakdale
Lake-shore owners (35)
Feet
3100
1950
803
3423
Percent
33
21
9
37
1
We are hopeful that the costs for treatment will not exceed $60,000 this year. This increase is
due to the new Minnesota Law regarding the use of certain types of chemicals. The MN DNR,
following the MN Pollution Control Agency's guidelines has determined the chemicals
appropriate for our lake. Because of the new law we cannot use 2,4 D as we did in 2007, but
have to use Tric/opyr. This has raised the chemical costs substantially therefore Maplewood's
share of the $60,000 will be $19,800.
We have again heard that Mapiewood is going to improve the park. on North End of Silver
(,loy Park)o It make sense improve a park on lake the A very
high percentage of Maplewood residents use this lakE, The boat ramp is witrlin ;Joy Park. People fish
from your lakeshore surrounding the lake on the North Side. People fish and use the park on the
South side of the lake, which is in North St Paul. Our Lake Association believes that improving the
lake adds value to both parkso
We are interested in restoring tbis lake and protecting it from becoming impairedo We believe that
had we not gone ahead with the proposed plant treatment In 2007, Silver Lake would have become
one more impaired lake.
The treatment amount for 2008 is $60.000. Maplewood's percentaCle would be $19.800 based
on your percent of shoreline. The check can be made out to Silver Lake Improvement, Inc.
Enclosed is the result of the treatment of aquatic plants that was done for the MN DNR As you can
clearly see, the treatment helped the lake, but this was for one year. We need to continue working
several years longer to be able to control the exotic species. Please join the other stakeholders and
help our efforts to restore Silver Lake.
If you have any questions, direct them to me:
Dr. Mike Mantheve~JA}J/' ~Z'l-4f;~'
President 771/b 11/&14,,)
Silver Lake Impro~ement Association, Inco
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2894 No. Lake Blvd.
No. 51. Paul, MN 55109
651-777-6343 Home
651-770-2381 Work
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Attachment 3
MINUTES
MAPLEWOOD CITY COUNCIL
7:00 p.m. Monday, April 9, 2007
Council Chambers, City Hall
Meeting No. 07-07
L NEW BUSINESS
1. Funding Request for Silver Lake improvement Association for Treatment of Noxious
and Invasive Weeds in Silver Lake
ao Environmental Manager Konewko presented the report
b. Paul Swan, 2932 Lake Boulevard, Secretary of the Silver Lake Improvement
Association, presented graphics showing lake quality and spoke regarding
Silver Lake's water quality.
c. Ron Cockriel, 943 Century Avenue, commented on disallowing boat ramp use
which brings invasive weeds into Silver Lake and suggested the council
prioritize the other effected lakes in Maplewood 0
d. Dave Johnson, 2587 Lydia, asked the council to investigate this project further
as there are still too many questions to appropriate funds to it.
Councilmember Rossbach moved to recommend the citv council appropriate $7,500 of funds
from the 2007 Environmental Utilitv Fund budqet toward the request for a one-year
demonstration treatment proiect to be implemented bv the Silver Lake Improvement
Association and that this fundinq shall be conditioned on the completion of a detailed
macrophvte survev as defined bv citv staff prior to the consideration of any additional fundinq
in subsequent vears: and that the report needs to include a report on properties within the
watershed participation and proiects that they have implemented to improve the lake: and that
the boat ramp be closed at least on a temporary basis.
A friendly amendment was added to include the broader picture studv of this to include our
environmental commission and the watershed so that we have everv possible perspective on
the wisdom of continuinq this and other impacts involved besides this treatment.
Seconded by Council member Juenemann
Mayor Longrie suggested that the city needs to prioritize lakes in Maplewood by water quality,
that she is concerned that the cities of North Sl. Paul and Oakdale have lakeshore residents
and yet will not donate to this project without Maplewood's participation, and that she is
concerned with the condition of the environmental utility fund.
City Attorney Kantrud recommended that the motion be clarified to include verbiage on
determining the reopening of the boat ramp. Commissioner Rossbach responded by clarifying
his motion to include that it would be left to the discretion of staff to recommend when to
reopen the boat ramp.
The council voted as follows:
Ayes-Councilmembers Juenemann, Rossbach
Nays-Mayor Longrie, Councilmembers Cave, Hjelle
The motion failed
April 9, 2007 Cily Councii Meeling
1
Aquatic Enginee:
Adf'!IIJcillg tit/! Sde/Jct! oj.-lss/!!,nllellt, llullagemellt aud Rehahilitatilltl of,
Post Office Box 3634 . La Crosse, Wisconsin 54602-3634 . Phone:
EIlilliL: Infor@aqu.aticenginc.::ring.org . Web Site: wwv,'..
Attachment 4
2008 Silver Lake "CLP" Aquatic Plant Management Program Work Order:
Aquatic Engineering, lnc. intends to provide all equipment, IX:fSOImel, insllffi!lces mxi permissions ne;.;ess<uy to amy out spe;:ific work
tatJ>.ed a.~ (klailed below. The nnallCf.lOLl v,.iU include a description orlhe SlJIvey nvhods, survcy
rcsill1s.. and treatment ~ uU in ao:ordanc;: willi CFSJGlB re!jllfrCnM:.UIS
1. pj'c_r-~t.m<lgem(;fl1DeHvcra.bles
a. MD:NH: l''IlrnUi l\~l",.m1hm& ,'""jT(l<jx,Mw"n.'llb:rSCI;.
b MDKll.l'-'frnjj r",~"iI"d Pub!i~ Nd;ce to (50) 'jly LJ\.:<l Rf<<,;b,j<; :liT9 iw ,knvCl-""1I by sr./<
c. l-\AlilliMDNJt CLP & EW M ,slip Fib; $'fo ~ -rl...ll..",,,,ij by "LA
.i.. Prc- tvlu:v.agemcm MOlljtOling 3T.. b<: J!di,,~'>:p.l hy MDNll!
3. Herbidde Fee to !reaL Curlyk:<lfPondwecd ,'lith
il. Aqmllhol K@) I ppJU S4i,OO per acre/foot C~ 277.6 acre/feet
~~~ Total $11,381.60
,I"iote: Bathyme1l")' mid Volume CalcuJatiws provided b.V A1D]\/R'
ApplicationFec to treal CurlyJe<lf Pondwt-'Cd Witll:
a. Areas greaLer than 30 acres $42.50 ller acre/foot
#0 "'" S2,893.83
#4 = $5,173.53
#5 = $1,..'"i88.65
#6 = $1.340.03
Total $10,996.04
b. Areas greaLerthan 3 Heres less tIlan 29 acres $64.25 per acre/fool
#1 =Sl,,348.61
#2 = $831.40
#3 = $1.438.56
Tolal $3,618.57
c Areas less U'-1I1::1 acres $87.50 Iter acre/foot
#7 = 105.88
#8 = S87.50
Total $193.38
l',!ole: Rathymelry and k'viume Calculations provided by MDNRi.
277.6 acre/feet estimate@ 1.0llpm = $26,189.59
4. Aquatic Engineering, Inc. will post all signage in accordance with state and federal regulatory requirements. Aquatic
Engincering, Inc. intends to prmide proper notice and or signagc pllniuafit to state statutes to au llnlmO\'r1l quantity ofLakc
Residents for a fee of $2.00 per notioc. Aquatic Engineering, Inc. intends to assure removal of signage for (I fcc of$1.00 per
sign or buoy. Historically, property owners have removed tbeir own sign.1gc-, however, with this bid cousidemtion AEI will
note, check and fCmove every posting in a timely manner post applicmion.
5 Post~ Man.agement Monitoring $To be dellvuelllly MDNR!
6. 200K APM Plan Implementation Technical Report; $1,725.00
Description of policies and procedures section...
I. Herbicide tn be uled will he Aqllalhol Kat pres<orihed 1.0 ppm ,In...gcs. Label endosed.
2. Me.thods _ A precision AIIll<llie l'esticiw Applicatioll Sylltem md lncrhnds (APAS US Patent #6, 77/1./187 B2: Pale/lIS Pendll1g) will be utilized
to enSHTC precise appli~",tion <tfh~'t"bieide" wilhin the lake. 'll,e APAS i" capable ofiJTl]llemerrling Variable AppliculiOfl Rale (FAR) techno;tlogy
that aC\:Olurts for varialiull' in lpe<.:iJic lake atlribu~. such as ""dEIce area., wa1,," qllldity panllucters, planl 'I",cies and tknsitie&, as well a. water
d"lllh and volume_ The l\PAS c"mprise'" l1<Jating v,,"sd, di,peming ~yrlelll, and a receiver on the "e.~el for receiving positiull da.1a from a
glubal positioning foltellite (UPS) system that is contillllou~ly receiving p,..ition and allrihuie data 10 the dispensin~ 'ystem to mSI",'L<;e
peslicide(5) to th" hodyofwater when the ,""sscl is directed o,'cr the applicati On al"C<l" within the bodyufwater.
3 Contractor will po.t all signaCJ' in accor<1allce wilh Slale and feder"l regulatory requ;rcn\ellw.
,1. Sl.A will b" notified 4 <lays AND 2'I-hou'" pn<}r to Ic",lIment. SLA may Ob5",,^, Ih" !featmenl fnlln a sale distance and a..ume AI.L 5alely
rcqUlremellls.
An as-applied post-lrealmerrl map will be pru~idcd wilhin one week. oJIb" applicalion.
A Bndl:c(a,"y Relrt,idhln l.olllpp(iCllble (S21,914.S9 MIN) to the project in Its entirety Imd tbe t6tal {""posed proj"d wlll not u.,.,,,d Ihe bu.Jgetary
ReHtriction lUi uwtilnted by Ihe Silver Lah ,\MOdatWlI andtwreby agreed to by A((uatlc EagUR><''''I1i> Inc.
Authorization for Budgetary Restriction of $
authorized by
AUTHOlU:r~~TION TO I'ROCEEH
AqllaticEugm.,ering,Inc.
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ny)/'"
Tilk: Prcsidcut Dale; March 7, 200S VALiD fur 15lliy.!
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Sil~HI,w.~i.latliin, :l;Nv
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Aquatic Engineering, Inc.
Adwmdll}: tlle Sdem:e tlfil...~es,mlelll, MIlllagelJltml alld Re!uJ.bilitfft;,1II /if /Jur Aqmllic EJtv;rlll/lIIetlla! R.~~lIIm:es!
Post Office Box 3634 . La Crosse, Wisconsin 54602~3634 . Phone: l'l66-781-817n . Fax: 608~781"8771
Email: Info@.aquuticcngineering,org + Web Site: www,aquaticengincering.org
2008 Silver Lake "EWM" Aquatic Plant Management Program Work Order:
Aquatic Engineering, Inc. intends to prmide all equipment, pcr50ffileL insurances and pcnni&;ionc: necessary- to carry oul specific \\"OIT.
tasked as detailed below. Thefuml report will include a descriptiDn of !he survey mctlmds, survey results, und treatment l1li'lps all in
accordan.ce wiJh Gf'&lGiS Jf'.AJ.Hin:n:<t:!IIS.
J.. Pn;:-MauagemcllJ De!iverd'il~
a MDNR P<:rrnrt rr"fl<UB!ioD It F~" 1\'1'" "'" ",dhltrul by SLA
b. MONR Pem,;! l~quird :l'\lbJi" l~ooiCl) t,.> {50) qly La!;" lk<j,le":l~ ;!,Til h ,kJ.vcrat by fiLA
C. BARRiM:DNR CLl' & r~WM _oh!, Fil~s $Tll"" ,i~live!'ed by ,,1.A
2 Pre~ :tvtanagmueol Monitoring $T<ilo be ddluc...,d ll,. MlJNR!
Fee 10 broadcast !reat 38.69 acre (246.1 acre/fect) wilh liquid tridopyr at 0.50 ppm per acre/foot.
Herbicide Fee to treaL EWM ""ilk -_.~~-~
a. Navigate@05ppm$13.67 per .acre!foot >= $Ui,130.19
b Naviga.tc@0.25 ppm $36.84 per at:relloot =: $9,066.32
Nule: Batf~ynjdry and Volume Caiel.lotions provided by iV1D/'/R!
Application Fcc 10 iI"eat EWM with:
Areas greater than 30 aCl"C-'l $42.50 ~.oel' aCH'Jfoot
#fI '" $2,893.83
#4 = $$.173.53
Total $8,067.36
Areas greater than 3 acres less tlllUl29 acres $64.25 per acre/foot
#1 =Sl,348.61
#2'" $831.40
#3 '" $1.438.56
Total $3,618.57
Areas less than 3 acres $87.SI.t per acreJfoot
NONE
Note: Ralhymef/:v and Volume Calculations provided hy AfDNR!
246.1 af.re/feet estimate@0.25 ppm =: $20,752.25
246.1 acre/feet estimate@ 0.50 ppm = $29,816.12
Note: Our pa/ertu;d APAS l)'slem.~ (Ire aemmle fa wllhirt 2-5% erMr dll~ If) UPS errOr ilnd dilurion; 30.a~rI1eere minltlluml/>el' dayl
4. Aquatic Engineering, Inc. will post all signage in accordance with s1ate and federal regullltory requirements. Aquatic
Engineering, Inc. intends to provide proper notice and or signagc pursuaut to state statutcslO an unknown qwmtity of
Lake Residents for a fee of $2.00 per notice. Aquatic Engineering, Inc. inLend" (0 assure removal of signage fOf a fee
of$1.00 per sign or buoy_ Historically, property owners have remov<.Xi their o\'tn signage; however, with this bid
consideration AEI will nole, check and remove every posting in a timely rnallner post application.
5. POSl~ !vfanagemellt Monitoring STo be dfliVfrM b~' J\.IDNR!
Dioas~y Fcc: Tridopyr Rapid A'AAY $250 p<-'f as".ay (J il.~"y mill) =$
NOTE; 'l'tlrn. determined by SLA ---
6 2008 APM Plan lmplemcnrntion Technical Report: $1,725.00
Description of policies and procedures section...
I. H~'fbidde 10 be lI~ed wiU bc Renovate al preBeribed 0.50 ,,(),2~ I'l'm dosab"'. Label enclu8Cd
2. MetltOlb _ A preeiKion Aqllati~ p~~tidde Applielllion System and ",ethod~ IAPAS US Palenl 116. 7?S,887 82: Pme1Jl. Pelllli1Jg) ",ill be utilized
10 elllsur~ preci~e application of her bid des wilhin tJl~ lake. The A.PAS is capable ofinrplemenling Variable AppliClltioo RolLe (1-:41<1 technology
lhalaccounts focvariplionsin.p..:eificla!;:eallributesslIcha."urface a t1la,wat~'fqualitypanuucters,planL.po.:ciesllllddew;ilie..,J.!IweUa.<wal"r
delrth and volume, The APAS comprise>; a floating Vlffi~el, dispensing ~y~telll, and a re~eiver on the vcs~d for receiving JJOOlition <lata fr<.lm a
global po,iliouing satcllilc (GPS) ayalem that is ~onlillllO\JSly rCl'Civing I'osili<.>n lIIld attribute dala (<) the di~l'ell'ing ,")'slem t<.> ,ji.pc-n!;C
pc~tidde(3) t<.> the hody ofwal~T when the VC8ll<'1 is directed uwr the al'pli""li011 Mea:; within the body orwat~,.-.
:t Cllntr~ctor ~'ill po"l all signage in accordance with ilale and fed~nd regulalory rl"lllir"menl3
4. SLA will be nulilicd 4 days AND 24"hllUr.; priortotreat.menl, SI.A IIlIlY observe tbetreatluent from a ""fcdis1ance amI ~,"ume ALL ll.'Ifety
reqlliremmrts.
5. An a""applied jJOJrt_trealm<ululJlll will be provid<:d within oTh' week of the 1I1'p!ica\ioo
A Budgdal1. RMriction 1/1 applkabJ<> ($12,477.25 miIdmwn) t.. tile projed ill il>l entiNty RIld the tutal Pf"'ll""""" prlljl'\'"t wllllH't eRl't'tJ the budgetary
RClitrlct1un ll'lIWltituted by o,,~ Silver Lal<e A~...cllltiull a"d hereby Hgn'<'d t.. hy A'Ill"tie ....nlfllleeriu\:, Inc.
Authorization for Budgetary Restriction of $
authorized by ~
AlJTnORllATlON TO PROCEED
Aqwdkl!.ngineerillf;\,lm.
~Z,dIUL~~;.c
BY/'-'"
TitJ~: Pr,,.,dent Di<le: Mu.rcl17, 200K VALID fur l!5lhl~'.!
"""L"f:~~,
'L,rYM<~~
ritJe.__0'l.R4.~i=-----_D"le 7-1 il:{10:~
Thf<originaicopymm-lberwTM.dr(i:
.411If1ticE}l!!i,v.:NiIlS,b,,:.
PO~lOJh(:R()x36J4
12 Cro,~e. vn ~4,-~)~~'J6}4
= ill,
m-
",10
InZ
Attachment 5
Invasive Species of Aquatic
Plants and Wild Animals in
Minnesota
DEPARTMENT OF
NATURAL RESOURCES
Minnesota Department of Natural Resources
invasive Species Program
500 Lafayette Road
Sf. Paul, Minnesota 55155-4025
contributing authors and editors'
Brenda Asmus
Susan Balgie*
Jennifer Bury
Wendy Crowell*
Steve Enger
Nicole Hansel-Welch
Gary Montz
Ann Pierce
Nick Proulx
Jay Rendall
Rich Rezanka
Luke Skinner
Ken Soring
Chip Welling
Heidi Wolf
David Wright
Submitted to
Environment and Natural Resources Committees
of the Minnesota House and Senate
This report should be cited as follows:
Invasive Species Program 0 2008. Invasive Species of Aquatic Plants and Wild Animals in
Minnesota: Annual Report for 20070 Minnesota Department of Natural Resources, St. Paul,
MN.
Copyright 2008, State of Minnesota, Department of Natural Resourceso
Total cost to produce this f€port preparation $4,500.00: printing 51,350,00 for 200 copies
Preface
Each year, by January 15, the Department of Natural Resources (DNR) is required to
prepare a report for the Legislature that summarizes the status of management efforts
for invasive species (aquatic plants and wild animals) under its jurisdiction. Minnesota
Statutes, Chapter 84D.02, Subd. 6, specify the lype 01 information this report must
include: expenditures, progress in, and the effectiveness of management activities
conducted in the state, including educational efforts and watercraft inspections,
information on the participation 01 others in control efforts, and an assessment of future
management needs. Additional sections have been added to this report to provide a
thorough account of DNR's invasive Species Program activities and other activities
related to invasive species of aquatic plants and wild animalso
Invasive Species in Minnesota
Annual Report for 2007
Management of Curly~leaf Pondweed
2007 Highli~lhts
w Tile DNR increased funding for the grant program for pilot
projects for lake-wide controi of curly-leaf pondweed or
Eurasian watermilfoil for ecological benefitso Grants totaling
$200,000 were given to 15 lakes under this program for
lake-wide control of curly-leaf pondweed, or for the
collection of pre-treatment data.
. Legislation passed in 2007 requires that all applicants for grants to manage
invasive plants in public waters have a workable plan for improving water quality
and reducing the need for additional treatment. In addition, this law states that
grants may not be made for chemicals that are likely endocrine disruptors.
These criteria will be incorporated into the 2008 grant offeL
. The DNR continued to support research on the effects of lake-wide curly-leaf
pondweed treatments.
Introduction
Issue
Curly-leaf pondweed (Potamogeton crispus) is a perennial, rooted, submersed vascular
plant that was first noted in Minnesota about 1910 (Moyle and Hotchkiss 1945). Curly-
leaf pondweed is known to occur in 752 Minnesota lakes In 70 of the 87 counties
(Figure 9)0 Unlike most native plants, curly-leaf pondweed plants remain alive through
the winter slowly growing even under thick ice and snow cover (Wehrmeister and
Stuckey 1978)0 Therefore, it is often the first plant to appear after ice-out
By late spring, curly-leaf pondweed can form dense mats that may interfere with
recreation and limit the growth of native aquatic plants (Calling and Dobson 1985)0 In
mid-summer, curly-leaf plants usually die back, which can result in rafts of dying plants
piling up on shorelines, and often is followed by an increase in phosphorus (Bolduan et
aL 1994) and undesirable algal blooms. A key question underlying management of
curly-leaf pondweed is: to what extent do lakes experience algal blooms due to the
presence of curly-leaf pondweed, and to what extent do lakes grow large amounts of
curly-leaf pondweed due to an abundance of mid-summer algae and the nutrient regime
that supports this condition?
Curly-leaf plants usually die back in early summer in response to increasing water
temperatures, but they first form vegetative propagules called turions (hardened stern
tips)o New plants sprout from turions in the fall (Catling and Dobson 1985). In order to
obtain long-term control of curly-leaf pondweed, the production of turions must be
stopped. It is not clear how many years of turion reduction it will take to produce long-
term control of curly-leaf.
52
Invasive Species in Minnesota
Annual Report for 2007
J ~'\
-~_]o -'-U__'{ "
~1 1
I \
1--~'"'--i'l~m
-~-"--~ ~~._.___L I j r~
i L._____~ ,----~,
1i;J~-----
''--,~
r
\r~,
o.
/1'1"\ _~,_ .=-.~.~
'~j\ "'~7
)//
./
i...
~
00 0
o
. .
Figure 11. Curly-leaf pondweed locations in Minnesota as of October 2007
(compiled from reports from DNR Fisheries, Wildlife, and Ecological Resources
staff).
Goals
The DNR has two goals for curly-leaf pondweed management:
. To prevent the spread of curly-leaf pondweed within Minnesota.
. To reduce the impacts caused by curly-leaf pondweed to Minnesota's ecology,
society, and economyo
The DNR uses both enforcement and public awareness to achieve the first goal. The
DNR has two strategies to achieve the second goal. One is to provide technical
assistance to people who are managing curly-leaf pondweed. The other is to support
and participate in pilot projects and research to improve the management of curly-leaf
pondweedo
53
Invasive Species in Minnesota
Annual Report for 2007
Prevention of spread
The Invasive Species Program continued to use watercraft inspections, informational
materials, and public speaking engagements to further our efforts to prevent the
accidental spread of curly-leaf pondweecL In particular, access inspectors spent time at
several lakes, Wllich are heavily infested with curly-leaf pondweed (See Watercraft
Inspections and Awareness Events)o m,IR conservation officers also helped prevent
the spread of curly-leaf pondweed through enforcement of state laws that make it illegal
to transfer aquatic plants on public roads (see Enforcernent)o
Progress in Management of Curly-leaf Pondweed - 2007
Management of nuisances caused by curly-leaf pondweed
Lake residents and lake associations who do routine management of curly-leaf
pondweed to reduce nuisance areas using both herbicides and mechanical harvesting
undertake the majority of curly-leaf pondweed management done in Minnesota. Past
research supported by the DNR indicates that endothall herbicide used at low rates
early in the spring is more effective than treatment with dlquat at preventing turion
production in the treated areas, and reducing impacts to native plants (Netherland et alo
2000, Poovey et aL 2002). As a result, many of the routine treatments with herbicides
are now done with a low rate of endothall herbicide in early springo
During 2007, DNR staff actively supported efforts to manage nuisance levels of curly-
leaf pondweed by providing technical assistance to lake groups working to manage the
plant. Technical assistance included conducting lake vegetation surveys, guidance on
the best management practices for controlling curly-leaf pondweed, and assistance in
writing Lake Vegetation Management Plans (LVMPs)o In addition, the 2006 Legislature
directed the DNR to provide some funding to Lake Osakis in Todd County for curly-leaf
pondweed management. The DNR provided $30,000 for management of curly-leaf
pondweed in Lake Osakis in 2007.
Technical Assistance
Surveys of lake vegetation
In 2007, DNR staff conducted three types of lake vegetation surveys in support of curly-
leaf pondweed management: point-intercept surveys, surveys of buried turions, and
mapping of matted areas of curly-leaL Point-intercept surveys provide an estimate of
the distribution and frequency of occurrence of curly-leaf pondweed and native plants
(Madsen 1999)0 These surveys were used to describe the distribution and abundance
of plant species in surveyed lakeso They were also used, in some cases, to determine if
curly-leaf management activities were effective and to see if curly-leaf management
caused any damage to native plant communitieso DNR staff from the divisions of
Ecological Resources and Fish and Wildlife conducted point-intercept surJeys on lakes
with curly-leaf pondweedo Turion surveys were used to determine if successive years of
treatment were causing a depletion of curly-leaf pondweed turions in the lake
sedimentso Mapping was used to determine where curly-leaf pondweed formed dense
rnats and how those mats were interfering with recreational use of the lakeo These
efforts served as the basis for evaluation by local residents and the ON R to the extent
and severity of the problems caused by curly-leaf pondweed in these lakes, and were
used to help determine the best management strategy for the lakes.
54
Invasive Species in Minnesota
Annual RepOlt for 2007
Best management practices for controlling curly-leaf pondweed
Staff of the Invasive Species Program continued to provide the public with information
on the best management practices for curly-leaf pondweed control through individual
contacts and participation in publio meetings. In 2007, staff organized a meeting 011
submersed aquatic plants, which included several talks on curly-leaf pondweed control
In addition, staff also allended many lake association meetings to discuss the control of
curly-leaf pondvveed 0
The DNR recommends that herbicide treatments ot curly-leaf pondweed be done
according to the following guidelines:
Treatments should be done with an endothall-based herbicide such as
Aquathol Ko Treatment of areas more than one acre in size should be done at
a low rate, 0075 to 1.0 ppm endothall with 105 ppm used for areas less than
one acre in size. Treatments should be done when water temperatures are
between 50 and 60 degrees F, and are increasing. While treatment areas can
be estimated from surveys in the year before treatment for the purpose of
obtaining a permit, actual areas that will be treated should be based on pre-
treatment plant surveys conducted in April, in the year of treatment
These guidelines are based on research that has been done in Minnesota on early-
season treatments with endothall (Netherland et al 2000, Poovey et al 2002, Invasive
Species Program 2006, Skogerboe et alln Press) and guidance from United
Phosphorous Inco (formerly CerexAgri), the manufacturer of endothall based herbicides
such as Aquathol K.
Lake vegetation management plans
DNR staff worked with lake groups and local units of government to develop LVMPs.
L VMPs contain a description of the condition of the lake and plans to address identified
problemso The purpose of an L VMP is to develop agreement on goals for the aquatic
plant community, identify issues, design methods to reach those goals, and to design
methods to evaluate whether the goals are being reached or not DNR staff worked on
several LVMPs for lakes with curly-leaf pondweed in 20070 Many of the lake vegetation
surveys described above were conducted to evaluate the results of curly-leaf
management allowed by an L VMP or to help with the development of an L VMP.
Repeated lake-wide treatments of curly-leaf pondweed for ecological benefits:
Pilot projects and Research
Lake-wide treatments are those that attempt to treat all, or almost all, of the curly-leaf
pondweed in a lake. These treatments usually involve the use of endothall herbicideo
Exposure of plants to endothall for approximately 12 to 24 hours can provide high levels
of control of curly-leaf pondweed (Netherland et al. 2000, Poovey et al. 2002). Whole-
lake treatments are those that apply herbicide to the whole lake These treatments
usually involve the use of fluridone herbicide. Exposure of plants to 4 ppb fluridone for
at least 56 days can provide high levels of control of curly-ieaf pondweed (Poovey et al.
In Press).
55
Invasive Species in Minnesota
AnlJual Report for 2007
In order to provide long-term reduction of curly-ieaf pondweed, an infested lake must be
treated for several years in a row. This is so that the bank of turions will be depletedo
Even with repeated treatments, it does not appear to be feasible to completely eradicate
curly.~leaf pondweed from a water body (Invasive Species Program 2006)~ This may be
due to survival of some plants or turions, or germination of seeds (Newman et al. 2006).
Research done by the IrS~ Army Engineer Researcrl and Development Center (ERDC)
indicates that at least three years of repeated treatments, and possibly four, are needed
to significantly reduce the amount of curly-leaf pondweed in a lak~e (Invasive Species
Program 2006)
The four main goals of repeated lake-wide or whole-lake treatments are:
1. Reduce the interference with lake use caused by curly-leaf pondweedo
2. Reduce the abundance of curly-leaf pondweed for long periods of time.
30 Increase the frequency and abundance of native, submersed aquatic plants.
40 Reduce peaks in concentrations of phosphorous and associated algal bloomso
Increases in the frequency or abundance of native submersed plants and reductions in
levels of phosphorus and algae, which should increase water clarity, are considered
ecological benefits.
Operational applications of herbicides to whole lakes that are classified as public waters
(Minnesota Statutes (M.S 1 03G.005) are not allowed in Minnesota (Minnesota Rules
Chapter 6280: Aquatic Plant Management) because this destroys more vegetation than
is necessary to give riparian owners access to lakes. Unnecessary destruction of
vegetation in Minnesota waters is not permitted because plants provide many benefits
to lake ecosystems (M.So 103G0615). For these reasons, application of herbicides to
control submersed vegetation in Minnesota lakes is limited to treatment of no more than
15% of the littoral zoneo A variance from this limit can be issued by the DNR
Variances have been issued for pilot projects, which control curly-leaf pond weed by
whole-lake management, where there is a well-developed plan and a commitment to
monitor and report the effects of the treatment on the lake.
Pilot lake-wide treatments funded under DNR grant program
DNR staff working with lake residents, lake associations, and local units of government,
have participated in several pilot projects in which herbicides were used to control curly-
leaf pondweed lake-wideo Twelve of these projects were partially funded under a new
DNR grant program "Pilot projects to control curly-leaf pondweed or Eurasian
watermilfoil on a lake-wide basis for ecological benefits" which was introduced in 2006
(http/lwww.dnrostate.mnous/Qrants/habltat/lakewideohtml)0 Funding under this grant
program will be available in 20080
The DNR established this grant program to provide funding for pilot lake-wide curly-leaf
pondweed and Eurasian watermilfoil control projectso The purpose of offering these
funds was to allow a limited number of well-planned and well-monitored projects to go
forward in order to determine if ecological benefits could be obtained by lake-wide
control of curly-leaf pondweed or Eurasian watermilfoiL The effects of funded projects
56
Invasive Species in Minnesota
Annual Report for 2007
have been and will be carefully monitored in order to determine how and where to use a
lake-wide treatlTlent approach in the future III 2007, this grant program made $190,000
available for lakeowide control of curlYoleaf pondweed or Eurasian watermilfoil (Table 7).
In addition $10,000 was made available for the collection of pre-treatment plant
occurrence data (Table 8)0 The maximum amount available to anyone project was
$30,000.
Thirty-eight project proposals were submilled for grants under this program for 2007.
An additional five preliminary applications were submitted Fifteen projects (Tables 7
and 8) were selected to receive a grant Project proposals were ranked by the grant
selection committee based on potential benefit to the aquatic environment, possible
negative impacts of the proposed treatment, size of the project, the quality of pre-
treatment data available, and, in the case of curly-leaf pondweed treatments, the ability
of applicants to continue lake-wide treatment in the future without grant fundso In
addition, projects were chosen that were located in different parts of Minnesota.
Lake-wide curly-leaf pondweed treatments were done either with fluridone herbicide at
400 ppb or with endothall herbicide at 0075-1.0 ppm. A combination of 1.0 ppm
endothall herbicide and 100 ppm 2,4-D herbicide was used to treat the Eurasian
watermilfoil and curly-leaf pondweed in Silver Lakeo All treatments were done in late
April or early May, when water temperatures were between 50 and 60 degrees F.
In order to be accepted into the grant program, there had to be adequate pre-treatment
data available on the lake proposed for treatment. Ten thousand of the $200,000
available was set aside for grants for the collection of pre-treatment aquatic plant survey
data. Three projects were granted funding for that purpose (Table 8).
Monitoring of pilot lakes
All of the lakes included in the grant program for pilot lake-wide treatments had previous
aquatic vegetation surveys. Several of the lakes included had been studied in previous
years by various cooperators. As part of the grant program, all of the included lakes
had aquatic vegetation surveys done, as well as water quality monitoring.
Surveys of Aquatic Veqetation
The DNR is providing $119,000 to Dr. Newman at the University of Minnesota (U of MN)
to monitor changes in the aquatic plant community of Lower Mission, Weaver,
Crookneck, Fish, Julia, and Rush lakes, as well as three untreated reference lakes in
2006 through 2008. In 2007, lakes were surveyed for plant community characteristics
three times per year using the point-intercept method (Madsen1999)0 Lakes were
surveyed in April, May, late June, and late August. Surveys in April or early May were
done before or within one week of treatment in 2007 (prior to any treatment effects) 0
Plant biomass samples were collected on each sample date in order to estimate curly-
leaf and native plant abundance. Turion density was determined for each lake once per
year in early fall using sediment sampleso
57
Invasive Species in Minnesota
Annual Roport for 2007
Table 7. Pilot program - Projects granted funding for lake-wide control of curly-
leaf pondweed (CLP) or Eurasian watermilfoil (EWM) or both ill 2006 and 2007.
A-inount 1 Amo1.Hlt-, -~-
Acres Granted i Granted I'
Treated in 2006 : ffi 20G? Type of
In Z007 ($1,000511 ($!,OOOsl _TrQ~tmeI11
250 : 2::-: I 251 ec]juth311
. :: ~o I '0' : "0"",""
~I
! County I lake
! Crow V\fing -r-~ower fV'!ission
~:;~;,: I ,~""
Isantl__
i-
Lincoln
treatment
in
2
-------.l_~_
CLP
CL;~.....
CLP __.1
CLP I
I
,
Weaver 150 Wi 10 fluridone
---- -
Long 300 0 20 endothall
.. . - -
Benton 2600 i 3D 30 ! fluridone
, ,
Clear I 140 0 20 endothall
10 I -----
Crookneck 20 10 endothall
1
Silver 50 0 10 I endothall/2
Fish 20 10 10 I endothall
Julia and RushH 100 10 10 endothall
Blueberry 230_~ 25 I endothall
.. I
~
_J...3_
I '
0,
---t--'- .
3
CLP
Ramsey
CLP
2 CLP
,4-0 EWM
and CLP
3 CLP
2 I CLP
1 CLP J
Meeker
Morrison
Scott
Sherburne
Wadena
* Medicine was not treated in 2007, even though they were offered a grant, because the cooperator did
not want to pursue treatment due to low levels of curly-leaf pondweed in April.
H Julia and Rush are part of the Briggs-Rush-Julia chain of lakeso Both lakes had lake-wide treatments
for curly-leaf pondweed as part of one treatment piano They were granted $10,000 towards those
treatments.
Table 8. Projects granted funding for the collection of aquatic plant survey data
in 2007.
County Lake Size
-
Isanti Florence
LeSueur Tetonka
i
Morrison Long
Amount Granted ($1000s) I
----~
2
of Lake (acres/littoral acres)
141/127
13361 548
~-
6
2
-~
-----.J
120163
en
,...-0
Invasive Species in Minnesota
Annual Repot1 for 2007
Aquatic plants in the other six lakes in the grant program were surveyed by staff of the
Invasive Species Program, ERDC researcher John Skogerboe, Steve McComas of Blue
Wat"r Science, Carolyn Oindorf from Fortin Consulting, and private consultant Matt
Swansoll. Dr. Newman and his staff, along with Invasive Species Program staff are
analyzing data from these sLwveys
Water qUJJ.lity Monitoring
Various water quality parameters were measured on the pilot project lakes (Table 9). In
addition, Secchi depth readings were taken twice monthly throughout the spring and
summer by the cooperators on each lake granted control dollars Dr, Newman and his
staff collected a light, temperature, and oxygen profile in each of the lakes he worked
on, as well as collecting water samples for phosphorus and dllorophyli a concentrations
on each plant sampling dateo
Results of repeated lake-wide treatments
The following are some recent results of lake-wide treatments that have been going on
for several years. A report of results from 2006 and 2007 treatments should be
available in the spring of 20080
Effects on target plants:
Comments from lake residents, aquatic plant surveys, and DNR staff observations
indicate that the treatments were successful in controlling curly-leaf pondweed and
Eurasian watermilfoil
Effects on native plants:
Most treated lakes have experienced both an increase in the overall distribution of
native aquatic plants and declines in the distribution of particular species. In addition,
Medicine Lake, which contained Eurasian watermilfoil at the time of treatment,
experienced a large increase in the distribution of that invasive specleso
Lower Mission Lake, Crow WinQ County
The 2006, treatment of Lower Mission Lake was associated with an increase in the
maximum depth of vegetation, an increase in the distribution of some native species,
and a decline in the distribution of other species (Table 6)0 The maximum depth of
vegetation increased from 4.8 meters in June 2005 to 700 meters in 2006 (Perleberg
2005, James Johnson, U of MN unpublished data)o
Medicine Lake, Hennepin County
There were no substantial declines in native species following treatment. Most native
species had a small increase in frequency comparing 2004 to 2006. The only
substantial increase in a native species was an increase in Elodea canadensiso In
addition, the frequency of Eurasian watermilfoil in the lake increased substantially from
September 2004 to September 2006 (Table 11).
b9
Invasive Species in Minnesota
Annual Report for 2007
Table 9. Water quality parameters measured on pilot lake-wide treatment lakes in
2007 in addition to Secchi depth.
~~l:~~~::~~""d _~~T~:~~::q~~mPI: ~":"~ by 1
emWIJIi] ,o_a p lOSp orus I-wee y i lree Ivers 8r
j Medicine Cholorophyll a District
Total nitrogen
Soluble reactive phosphorus
I temperature, dissolved oxygen,
pH. and conductivity profiles i ! - "
Henne2in Total phosphorus Bi-weekly Three Rivers Park
Weaver Cholorophyll a District
Total nitrogen
Temperature, dissolved oxygen,
pH, and conductivity
Isanti Total phosphorus Twice Citizen Lake Monitoring
Lona Cholorophyll a monthly Program
Lincoln pH, alkalinity Monthly Lincoln County
Benton Cholorophyll a Environmental Office
Total suspended solids
Morrison Total phosphorus Monthly Professional Lake
Crookneck Cholorophyll a Management
Dissolved oxygen/ temperature/
pH, alkalinity
Ramsev Total phosphorus Twice Ramsey County
Silver Cholorophyll a monthly
Total nitrogen
Temperature, dissolved oxygen,
pH, and conductivity
SRP phosphorus
Turbidity
Scott Total phosphorus Bi-weekly Three Rivers Park
Fish Chlorophyll a District
Total nitrogen
Temperature, dissolved oxygen,
pH, and conductivity profiles
Sherburne Total phosphorus Twice/month Citizens working with
Rustl and Julia Chlorophyll a DNR staff
0_ -----..-- ----- ,......-
Wadena . Total phosphorus Monthly Citizen Lake Monitoring
--_.,~ I
J:lI~eberry ~_-.-l Cholmophyll a ~~--~--- -'..~ Program
60
Invasive Species in Minnesota
Annual RepOlt for 2007
Table 10. Percent occurrence of native submersed aquatic plant species with a
frequency of 10% or greater on at ieast one sampling date In lower Mission lake.
Lower Lake 'Nas subjected to lake-wide endothall treatment 111 2006 and
ZOO?
r---. .. . .
1 ,June 200(;
, (Johnson, U of MN)
I
_ Species. ...1
I (Coontail) . . I
ceratoPhYIIUmde~
(Canadian waterweed) i
Elodea Canadensis I
i
2005
(Peleberg 20(5)
30
31
I
I (Flatstem pondweed)
Potamogeton zosteriformis
(Musk grass)
Cham spo
(Northern watermilfoil)
Myriophyllum sibiricum
10
9
15
Table 11. Percent occurrence of submersed aquatic plant species with a
frequency of 10% or greater on at least one sampling date in Medicine lake.
Medicine lake was subjected to lake-wide endothall treatment in 2004, 2005, and
2006. Data collected and analyzed by John Skogerboe ERDC, as reported in
Vlach and Barten (2006).
~;::~;;I) p_eptem3:er 2004 l~etE!m3:er2005 I sePte.~:er20061,
Ceratophyllum demersum I
(Canadian waterweed) 4 14 '>-=
Elodea Canadensis
(Bushy pondweed) 5 8
Naias f1exilis 10 I
i
(Sago pondweed) 16 15 15 ~
Stuckenia peetinata
(Wild celery) 27 33 32
Vallisneria Americana
I (Musk grass) 13 17 019 --
Cham sp.
(Eurasian watermilfoil) 8 18 70
Myriophyllum spicatum
6'1
Invasive Species in Minnesota
Annual Report for 2007
Weaver Lake, Hennepin County
The 2005 and 2006 fluridone treatments of Weaver Lake were associated with an
increase in the maximum depth of vegetation, an increase in the distribution of some
native species, and a decline in the distribution of other species (Tabie 012)0 The
maximum Cleptl1 of vegetation increased frorn 3.4 meters in August 2004 to S.6 meters
in August 2006 (Johnson U of MN, unpublished data)o Most common submersed
aquatic plants increased following treatment with the exception of CeratoplJyllum
demersum, which experienced a substantial decline in distribution (Tabie 12).
Table 12. Percent occurrence of submersed aquatic plant species with a
frequency of 10% or greater 011 at least one sampling date in Weaver Lake.
Weaver Lake was subjected to whole.lake fluridone treatment in 2005, 2006, and
2007 (Johnson U of MN, unpublished data).
I Species I
August200~ u August 2005u August 2006 ---.
(Coontail) 82 38 33
Ceratop/Jyllum demersum
.".-----.
(Flat-stem pondweed) 3 5 13
potamogeton zosteriformis
(Sago pondweed) 3 6 18
Stuckenia pectinata
(Wild celery) -- 12 17 23
Vallisneria Americana
(Water star-grass) 2 I 7 u\ 19
Zosterella dubia
L---____ .
Lake Benton, Lincoln Countv
The effects of fluridone treatment on native plants in Lake Benton are mixed In June
2006, the overall frequency of native plants was 4%, which was higher than the overall
frequency of native plants in June 2005 or 2004. During 2006, Invasive Species
Program staff collected native plants for the first time in a biomass sampleo
Nevertheless, Potamogeton riclJardsonii, which was observed in Lake Benton in July
2004, has not been observed since theno In September 2007, DNR staff worked with
Lincoln County staff to plant native submersed aquatic plants in one area of the lakeo
Plant propagules were placed in enclosures to help protect new plants from damage by
fisho
Effects of control of curly-leaf pondweed 011 water clarity
It has been hypothesized that an overall reduction in the amount of curly.leaf pondweed
in a lake will lead to a reduction in the internal ioading of phosphorus, an associated
reduction in algal levels, and an increase in mid-and late-sulTlmer water clarityo To date,
data from lakes in the pilot project program have not been completely analyzed.
62
Invasive Species in Minnesota
Annual Report for 2007
Available Secchi disk observations show trends of increasing transparency in Lower
Mission, Weaver, Benton, and perhaps Fish lakes (Table 13). In Crookneck,
transparency may have decreasedo In the other lakes them did not appear to he clear
trend over years in Secchi disk transparency.
One lake in the program for which detailed water quality anaiysls is available is
Medicine Lake in Hennepin County. This is an 8g0-acre lake with 400 littorai acres tllat
was subjected to lake-wide early-season treatment with endothall herbicide in 2004,
2005, and 20060 Water quality parameters were monitored by Three Rivers Park
District Their data showed that "[2005 and 2006 phosphorus] concentrations were an
improvement [ioeo lower] in comparison to pre-treatment years when excessive growth of
curly-leaf pondweecl contributed to phosphorus loading." Nevertheless, Three Rivers
Park District believes that "The decrease in total phosphorus concentration from the
reduction of curly-leaf pondweed may be offset by increases in watershed
loadingoo.Despite a decrease in phosphorus concentrations for 2005 and 2006, there
were no significant differences in chlorophyll-a concentrations or Secchi depth
transparency." (Vlach and Barten 2006)0
Table 13. Mean annual Secchi disk transparency (meters) in lakes subjected to
lake-wide treatment of curly-leaf pondweed. All data, with the exception of data
for Lake Benton, comes from the Minnesota Pollution Control Agency online
database.
Lake
c I
0
Year 'u; ""
o~ OJ <> i
:2: c ~ OJ ...~ J
~ :Q OJ c c
OJ > 0 ""
~ '0 '" - 0 .c Jg
~ c 0
0 OJ OJ ~ o~ :J
-' :2: aJ 0 LL --,
Pre- 0.8 1.6 107 005 3.0 12 0.7 0.5 I
treatment ___.___-----J
1 1,7 HI 4.3 005 2.6 1.1 0.6 .~
I __,___
2 3.2 .F1.3- 1.5
, 3 1A
Research to improve management of curly-leaf pondweed
Status of on going evaluation conducted in Dakota County of early-spring
application of low rates of endothall for selective control of curlyleaf pond weed
From 2000 through 2003, ERDC researchers used repeated early spring, whole-lake
applications of endothall applied as Aquathol K for control of cur!y-Ieaf pondweed in two
Dakota County lakes (Invasive Species Program 2005)0
60
.)
Invasive Species in Minnesota
Annual Report for 2007
Early spring, whole-lake applications of endothall applied as Aquathol K for control of
curlyleaf pondweed (Potamogeton crisp us) were discontinued on Schwanz Lake (13
acres) and Blackhawk Lake (37 acrcs) after 2003. Curly-leaf pondweed was reduced to
low levels in spring 2004, alld residual turions in the sediment were nearly ellminatedo
III spring of 2004, a second study was initiated to demonstrate the use of smail scale
applications of endothall applied as either jl,quathol K or Aquathol Super K to prevBnt
curly-leaf pondweed from returning to nuisance levelso No treatments were conducted
on Schwanz Lake in 2004, anel 12 acres were treated on Blackhawk Lake using
Aquathol K.
Aquathol Super K was applied to 2 acres on Schwanz Lake and 6 acres on Blackhawk
Lake In April 2005, and 15 acres and 5 acres again n April 2006. in April 2007, 15
acres on Schwanz Lake and 14 acres on Blackhawk Lake were again treated with
Aquathol Super K. Low levels of curly-leaf pondweed continue to persist in both
Schwanz and Blackhawk lakes, however, the plants remained below nuisance levels
with small-scale maintenance treatments (Skogerboe ERDC 2007, unpublished data)o
Whole lake management with early spring application of low rates of endothail
combined with 2,4-D or triclopyr for selective control of Eurasian watermilfoil and
curly-leaf pondweed
ERDC researchers working in cooperation with Mississippi State University, the DNR,
and CerexAgri continued to test the efficacy of early spring applications of endothall in
combination with 2,4-0 against curly-leaf pondweed and Eurasian watermilfoil in two
Minnesota lakes (Invasive Species Program 2006). Field trials were initiated in 2003 to
demonstrate improved, selective, long-term control of curly-leaf pondweed and Eurasian
watermilfoii using early-spring applications of endothall combined with 2,4-D. Four
lakes infested with curly-leaf pondweed and Eurasian watermilfoil were selected in the
Minneapolis/Sl. Paul, MN areao Pre-treatment plant surveys were conducted in June
and August of 2003, and two lakes were treated with the combination of endothall (1
mg/L ail and 2,4-0 (005 mg/L ail in April 2004, 2005, and 2006. Endothall (1 mg/L ail
combined with triclopyr (0.5 mg/L ail were applied in May 20070 The two untreated
lakes served as reference lakeso Post-treatment plant evaluations were conducted in
June and August 2004 through 20070 Herbicide treatments were successful at reducing
curly-leaf pondweed and Eurasian watermilfoil densities by more than 95% throughout
the lakeso Herbicide treatments resulted in no significant changes in native plant
abundance or diversity during the first year post-treatment, but native plant diversity and
abundance did increase in treated lakes during the second and third year post-
treatment Water clarity was not reduced following removal of Eurasian watermilfoil and
curly-leaf pondweed. (Skogerboe and Getsinger 2006, Skogerboe ERDC 2007,
unpublished data).
Evaiuation of low rates of fluridone to control the growth and reproduction of
curly-leaf pondweed
The DNR provided $50,000 to the EROC to study the effects of fluridone herbicide on
curly-leaf pondweed growth and turion production (Invasive Species Program 2006).
The results of the first study indicated that 4 ppb fluridone is the lowest rate that will
suppress plant growth and prevent turion formation. In 2007, ERDC provided results
from an evaluation of the ability of fluridone-treated curly-leaf pondweed to withstand
varying levels of turbidity. They found that without turbidity, fluridone concentrations of
64
Invasive Species in Minnesota
Annual Report for 2007
3 to 5 ppb suppressed the growth of curly-leaf pondweed The addition of turbidity to
the water column further suppressed the growth of curly-leaf pondweed in all
treatments, including the untreated references, by as much as 80%0 Nevertheless, they
also found that numbers of turion produced bV the plants increased with increased
turbidity (Poovey et al. In preparation).
Future needs for management of Curly-!eaf pcmdweed
. Review available information on the ecology and management of curly-leaf
pondweed to identify possible research projects that might be carried out to
improve management of this invasive species in Minnesota
. Continue to provide funding for identified research needs, such as research to
determine the distribution, viability, and longevity of curly-leaf turions
. Continue public awareness efforts focused on containing curly-leaf pondweedo
Opportunities include our TV and radio advertising, Watercraft Inspection
Program, literature, and public speaking engagements.
. Continue to support the management of curly-leaf pondweed in the state through
technical assistance and grants for pilot projects.
References Cited
Bolduan, BX, G.Co Van Eeckhout, H.W. Quade, and J,E. Gannon. 19940
Potamogeton crispus - the other invadeL Lake and Reservoir Management
10(2):113-1250
Catling, P.Mo and I. Dobsono 19850 The biology of Canadian weedso 690 Potamogeton
crisp us L Canadian Journal of Plant Science 65:655-6680
Invasive Species Program. 20050 Invasive Species of Aquatic Plants and Wild Animals
in Minnesota Annual Report for 2004. Minnesota Department of Natural Resources,
St Paul, MNo
Invasive Species Program. 2006. Invasive Species of Aquatic Plants and Wild Animals
in Minnesota: Annual Report for 2005. Minnesota Department of Natural
Resources, St Paul, MNo
Madsen, Jo D. 19990 Point-intercept and line intercept methods for aquatic plant
management. U.S. Army Engineer Research and Development Center, Aquatic
Plant Control Technical Note (TN APCRP-M1-02), Vicksburg, MS.
Moyle, JoB. and N. Hotchkiss. 1945. The aquatic and marsh vegetation of Minnesota
and its value to waterfowl. Minnesota Department of Conservationo Technical
Bulletin 30 122 pp,
Netherland, MDo, JoDo Skogerboe, C.So Owens, and J. Do Madseno 2000. Influence of
water temperature on the efficacy of diquat and endothall versus curly-leaf
pondweedo Journal of Aquatic Plant Management 38:25-32.
Newman, R. Mo, SoSo Roley and J. Johnson. 20060 Continued Assessment of Curly-
leaf Pondweed Turion Distribution, Viability, and Longevityo Unpublished report
submitted by the Department of Fisheries, Wildlife, and Conservation Biology,
University of Minnesota, SI. Paul, MN 55108 to the Minnesota Department of Natural
Resources, Division of Ecological Services, 500 Lafayette Rd., SI. Paul, MN 55155.
65
Invasive Species in Minnesota
Annual Report for 2007
Perleberg, O. 20050 Aquatic vegetation of Upper Mission Lake (DOW 18-0242-00) and
Lower Mission Lake (18-0243-00), Crow Wing County, Minnesota, May 17,19,23,
26 and June 1 20050 Minnesota Department of Nfltural Resources, Ecological
Services Division, 1601Minnesota DL, Brainerd MN 56401, 17 pp.
Poovey, AGo, J.G. Skogerboe, and Owens. 20020 Spring treatments of diquat
and endothall for curly-leaf pondweed control. Journal of Aquatic Plant Management
4063-67.
Poovey, AG, 1V1. D. Netherland and W. Crowell. In preparationo Effects of Turbidity on
Fluridone Treatments for Curlyleaf Pondweed Control. ERDCnN APCRP-CC-OO
[2007]
Skogerboe, J.G., and KoD. GetsingeL 2006. Selective control of Eurasian watermilfoil
and curly-ieaf pondweed using low doses of endothali combined with 2,4-00 APCRP
Technicai Notes Collection (ERDCnN APCRP-CCo05)0 Vicksburg, MS: UoS. Army
Engineer Research and Development Center, Vicksburg, MSo
http://el 0 erdc. usace. army 0 mi I/aqua/
Skogerboe, John Go, Angela Poovey, Kurt Do Getsinger, Wendy Crowell, Eric Macbeth.
[In press]. Early Season, Low Dose Applications of Endothall to Selectively
Control Curlyleaf Pondweed in Minnesota Lakeso Aquatic Plant Control Research
Program Technical Notes Collection (ERDCnN APCRP-CC-xx [May 2006]) U.S.
Army Engineer Research and Development Center, Vicksburg, MS.
Vlach, B, and Jo Barten. 20060 Medicine Lake Endothall Treatment to Control Curlyleaf
Pondweed in 2005. Unpublished report prepared by the Three Rivers Park District,
3800 County Rd. 24, Maple Plain, MN 553590
Wehrmeister and Stuckeyo 1978. The life history of potamogeton crispus with emphasis
on its reproductive biology. Ohio Journal of Scienceo 78 (April program and abstract)
supplement: 160
66
Invasive Species in Minnesota
Annual Report for 2007
Management af Eurasian Watermilfail
Highlights
j
. Eurasian watermilfoil was discovered in ten additional \
Minnesota water bodies during 2007. There are now 202
Minnesota lakes, ponds, rivers, and streams known to contain
the submersed aquatic invasive plant
. One lake discovered in 2007 to have Eurasian watermilfoil was
Union Lake (Polk County) in northwest Minnesota where the
plant has not been seen previously.
. Cooperators on 28 lakes were reimbursed by the DNR for
control of unavoidable nuisances caused by dense and malted Eurasian
watermilfoil in public use areas of the lakeso
. Significant progress was made in improving our understanding of the ecology and
management of Eurasian watermilfoil.
Issue
Eurasian watermilfoil (Myriophyllum spicatum) is an invasive submerged aquatic plant
that was inadvertently introduced to Minnesotao Eurasian watermilfoil, hereinafter called
milfoil, was first discovered in Lake Minnetonka during the fall of 19870 Milfoil can limit
recreational activities on water bodies and alter aquatic ecosystems by displacing native
plants. As a result, Minnesota established the DNR Invasive Species Program to
manage milfoil, as well as certain other invasive specieso Milfoil is classified as a
prohibited invasive species, which means that it may not be bought, sold, or possessed
in Minnesota. In this report, we describe the efforts of the Invasive Species Program to
manage milfoil and limit its spread in Minnesota during 2007.
Spread of Eurasian Watermilfoil in Minnesota during 2007
Milfoil was newly discovered in ten lakes during 2007 (Table 14 and Figure 10). The
discovery of milfoil in Union Lake means that the invasive plant is now in another part of
the state that has not had to deal with this invasive plant in the past Inspection by the
DNR revealed that the plant was widespread in the lake and abundant in some
locationso This observation suggests that the plant had been present in the lake for a
period of years before it was reported to the DNRo Another concern about the presence
of milfoil here is that the lake has an artificial outlet through which water is pumped
when levels in the lake are high. The outlet is located in a wetland from which water
can run to the southwest and eventually into the Sandhill River, which in turn empties
into the Red River. Concern about the potential for milfoilto be pumped through the
outlet from Union Lake and ultimately carried into the Red River led the DNR to search
the waters downstream of the lake. To date, no milfoil has been found downstream of
the outlet from Union Lake
Five of the new lakes are located in the seven-county metropolitan areao Another three
of the lakes are located in "collar" counties, those adjacent to the seven county
metropolitan areao Milfoil is now known to occur in 202 water bodies in Minnesota.
67
Invasive Species in Minnesota
Annual Report for 2007
fhe rate of spread of milfoil in Minnesota, as reflected in the annual discovery of new
occurrences of the invasive, has ctlanged little over the last three to four years
Table 14.
during 2007,
of water bodies in Minnesota with Emasian watermiltoil
40 4
9 0
8 0
-[ -~~t
192 L
m~alll
141 '
4j
9;
I
Spring I 'New' i,) SUl11rrwr
135 6
!
Classification
Lakes eligible for management with state funds
Lakes ineligible for management with state funds
Public water but no public access
Not public water
Rivers or streams
8
I
I Total d'_
202
Discovery of new occurrences of Eurasian watermilfoil in Minnesota
Characteristics of some newly discovered occurrences of milfoil suggest that there likely
are other water bodies in Minnesota with the invasive plant that have not yet been
discoveredo In some cases, milfoil is discovered years after the time when it became
established in a lake. In other lakes, milfoil appears to have been discovered before the
invasive became abundant or widespread when it was noticed by a person with
knowledge regarding identification of aquatic plants.
Many false reports of milfoil result when other species of submersed vegetation, often
forming mats, attract the attention of users of Minnesota lakes. These individuals
suspect that the abundant vegetation is milfoil and report the occurrence to the Invasive
Species Program. During 2007, as in previous years, most of these reports were found
to be occurrences of various native aquatic plants It has been extremely useful for
citizens to send the DNR samples of suspected Eurasian watermilfoil so the plants can
be quickly identifiedo The DNR encourages the public to report suspected new
occurrences of milfoiL
Monitoring the distribution of Eurasian watermilfoil by other state agencies, local
units of government, and interested groups
The participation of the Section of Fisheries, other divisions of the DNR, outside
agencies, commercial herbicide applicators, citizens, and others in reporting new
occurrences of milfoil remain critical. This assistance is very important because staff in
the Invasive Species Program are only able to visit a limited number of lakes each year.
Efforts by others to search for milfoil and report suspected occurrences of the invasive
greatly increase the likelihood that new occurrences are discovered. The Program
investigates likely reports of new infestations as soon as possible for two reasons. First,
it is important to determine whether milfoil actually is present in the lakeo Second, if the
invasive is present, then it is important to minimize the risk of spread to uninfested
68
Invasive Species in Minnesota
Annual Repolt for 2007
r-'I,
\ 1--;:
r - -- 00_00_,
j I "--_
\-l= ;~,
\ -. I , (i
!- ~J '
\ 1~1
I
\
'l'-
.1.00
rr-.
2-,
\. r...~\
\..~ '~~, -'1
[1.., /{ 'o~~---'
I v'- I "'~
I I //
l ,/,",~o_
//
/
":)
I
~\
"~ 00
o L
~o
~
o
o
Lak6s a'nd rivers wiLt-i
Eurasian watermilfoil
o
o
00
. Discovered In 2007
o Discovered beforo 2007
I
Figure 12. Distribution of water bodies with Eurasian watermilfoil in Minnesota as
of November 2007. Union Lake in Polk County in northwest Minnesota, which
was discovered to have Eurasian watermilfoil in 2007, is labeled.
waters by notifying the users of the lakeo It is hoped that once people who use a lake
are aware of the presence of milfoil, they will be especially careful to not transport
vegetation from the lake on their boats, trailers, or other equipment.
Reports of suspected occurrences of milfoii that turn out to be mistaken also have
valueo In the course of responding to such reports, staff in the Invasive Species
Program discuss identification of the non-native Eurasian watermilfoil with the observer
69
Invasive Species in Minnesota
Annual Report for 2007
and so increase the number of people who in the future are lil,ely to be able to
distinguish the invasive trom native plant species that are similar in appearanceo
Management of Eurasian watermilfoil in Minnesota
ring 2007
water Tor of Eurasian watermilfojl
In the spring of 2007, the Invasive Species Program classified the 192 bodies of water
known to [,ave milfoil (Table 14)0 One hundred thirty-five lakes were detelmined to be
eligible for management with state funds because they have public water accesses and
are protected waters that are regulated by the state (Minnesota Statute 103G.005,
Subd. 15).
Some lakes were determined to be ineligible for management with slate funds because
they either do not have public water accesses or are not protected waters. Lastly,
flowing waters such as rivers and streams are not usually considered for management
of milfoil with state funds because 1) users of these waters in Minnesota rarely
encounter problems caused by milfoillike those found in lakes; and 2) use of herbicides
is less reliable and effective in rivers and streams than in lakeso
Six of the ten water bodies that were discovered to have milfoil during 2007 were
eligible for management with state funds because they have public water accesses
(Table 14)0 Four lakes found to have milfoil in 2007 have no public water access and,
consequently, are ineligible for management with state fundso
Management of Eurasian watermilfoil
During 2007, state funding and technical assistance were available from the Invasive
Species Program to potential cooperators for management of milfoiL The offer of state
funding is described in an announcement that is available to potential local cooperators
(DNR 2007) who are expected to take the lead in control of the milfoiL The offer is
briefly summarized here. The most common activity on lakes in the maintenance
management class that receive funds from the DNR was application of herbicide,
followed by mechanical harvestingo These funds are intended to pay for control during
spring or early summer of unavoidable nuisances caused by dense and matted milfoil
that will benefit a number of homeowners and the general public who use a lake
These funds may not be used for control work that would otherwise be done by private
individualso Typically, control undertaken by private individuals is done immediately
adjacent to the owner's shoreline or adjacent to structures such as dockso These funds
may also be used for control intended to slow the spread of the invasive to other lakes.
The DNR received applications for state funding to control milfoil from potential
cooperators on 30 lakes Crable 15). Applications were reviewed by the Invasive
Species Program in relation to the standards described in the announcement that is
available to potential cooperators (DNR 2007)0 Twenty-eight of the applications were
approved for funding. Questions about some applications led to inspections of the
milfoil in these lakes by staff of the invasive Species Program. These inspections
revealed that some sites proposed fOl treatment with herbicide either did not have
70
Invasive Species in Minnesota
Annual Report for 2007
dense and matted milfoil or did not constitute an unavoidable nuisance for users of the
lakeo The results of these inspections and recommended modifications of proposed
control projects werG reported to the potential cooperators and staff in the Aquatic Plant
Mana~lelllent Program who issue permits for control. On some lakes, proposals were
modified by reducing the size of tilE ama to be treated, and subsequently 21pprovedo
Applications tor reimbursement were not approved for two lal,eso
Table 15. Number Minnesota lakes where management of Ema.sian
watermilfoil was supported with state funds in 2002-2007.
I
i..... I APPiica.t.io..n.. s
120~2 : ",,',"eI ..
2003
32
I ~,~..P.I.i.c.,atiorlS den..,.ie.'d cr not
-Tfsued .
21 i
Applications
ilPproved
1J
32
4-
18 i
,
.~....
I
"L=..
....~
~I
2004 26
2005+__ ... -'4-
1::.2006....,. ..4--
C;=I_.~..
As a result, the DNR expects to reimburse cooperators on 28 lakes for costs of milfoil
management during 2007.
Assessment of Eurasian watermilfoil
In addition to control, the DNR also offers funding to support assessments of the
potential for Eurasian watermilfoil to produce dense and matted growth that might
interfere with watercraft use, swimming, or other traditional recreational uses of a lake.
The offer of state funding is described in an announcement that is available to potential
local cooperators (DNR 2006) who are expected to take the lead in assessment of the
milfoil. This requires a survey of milfoil in the lake to be done by a contractor, who will
then provide a report to the cooperatoro During 2007, the DNR received two
applications for reimbursement for assessments of milfoil in two lakeso One of the two
assessments was completed in 2007; the other likely will be completed in 2008.
Control of Eurasian watermilfoi! by the DNR at DNR public water accesses
The Invasive Species Program initiated treatment of milfoil on three lakes either in the
immediate vicinity of public water accesses operated by the DNR or in harbors on Mille
Lacs and Leech (Table 16). The purposes of this type of control are to: 1) reduce the
risk that users of the lake inadvertently transport milfoil from the lake to other bodies of
water; and 2) improve access to the lake
/1
invasive Species in Minnesota
Annual Report for 2007
High-intensity management of Eurasian watermilfoil
The goals of high-intensity management are to 1) limit the spread of the plant within a
lake; 2) reduce the abundance of milfoil within a lake; and 3) slow the spread of the
invasive to other iakes High-intensity management usually Illvolves efforts to find all
milfoil in a lake and treat it with herbicide. Highoointensity management may be
undertaken by the Invasive Species Program on lakes that either have small, recently
discovered populations of milfoil or are located in areas of Minnesota where there are
few, if any, other lakes with milfoil. During 2007, the Invasive Species Program
conducted high-intensity management on one lake in the Brainerd area (Table 16)0
Technical assistance to cooperators and other citizens
Technical assistance was provided by the Invasive Species Program to cooperators and
other citizens and managers. Staff of the Invasive Species Program attended
numerous meetings of lake associations and local units of government to make
presentations and participate in discussions of approaches to management of milfoil.
During the course of a season, staff of the Invasive Species Program have many
conversations with people over the telephoneo In addition, staff of the Invasive Species
Program exchange correspondence by regular mail and e-mail with people who need
assistance in dealing with milfoil.
Demonstration project for selective control of Eurasian watermilfoil and curly-leaf
pondweed in three bays on Lake Minnetonka
In 2006 a project was initiated on Lake Minnetonka to demonstrate the potential of
aquatic herbicides to provide selective control of Eurasian watermilfoil (Myriophyllum
spicatum), hereafter called milfoil. The project was led by the Lake Minnetonka
Conservation District (LMCD). Monitoring of aquatic plants was done by ERDC
researchers. The DNR provided technical assistance and the LMCD provided support
to the effort. Three plots were established on Carman, Gray's, and Phelp's bays
(Skogerboe and Welling 2007)0 Three different herbicide treatments were used
including triclopyr, 2,4-D, and a combination of endothall and 2,4-D. The distribution
and abundance of aquatic plants in the plots were monitored during Mayor June on the
day of treatment, early July, and mid-August during 2006 and during June 2007.
All three herbicide applications maintained low density of milfoil for the entire summero
Based on percent occurrence data, the combination of endothall and 2,4-D was not as
successful as in previous demonstrations in other lakes (Skogerboe and Getsinger
TM
2006). Previous demonstrations utilized 2,4-D applied as liquid DMA 4, but label
TM
restrictions did not allow use of DMA 4 in the relatively small plot on Carman Bayo
Consequently, 2,4-D was applied using the granular formulation Aqua-Kleen@, which
had not been previously tested in combination with endothall. The slow release of
herbicide from the granules probably resulted in insufficient 2,4-D in contact with the
plantso Native plants were abundant in all treated plots following the herbicide
applicationso
DevelopmenLof a.Lake Veqetation Mana~m,?nt Plan for selective cODjrglQtJ;masian
watermilfoil and clJjjy-leaf pondweed in three_bays on Lake Iv1innetonka
In 2007, an effort was begun to develop a Lal\e Vegetation Management Plan for three
bays on Lake Minnetonka. The rationale for the effort is to determine whether a plan
cail be developed to allow bay-wide seiective control of milfoil. The effort was initiated
72
Invasive Species in ~/Unnesota
Annual Rep0/1 for 2007
by the Lake Minnetonka Association and the LMCD. To date, three meetings with
stakeholders have been held and a fourth such meeting is expected to be held early in
20080 Monitoring of aquatic plants in support of this effort during 2007 was done by
ERDe researchers The DNR provided technical assistance
Effectiveness management of watermilfoil in Minnesota lakes
Trlough the number of Minnesota lakes known to have rnilfoil increased in 2007, the
number of lal,es from which applications for DNR funding for control were received
remained much lower than the number of lakes eligible to apply (Tables 14 and 15)0
The number of lakes where cooperators received DNR funding for control of milfoil
during 2007 increased slightly by comparison with tr1e previous year (Table '15).
Participation in control efforts by other state agencies, local units of government,
and interested groups
Cooperation between the Invasive Species Program and organizations outside the DNR
such as lake associations and various local units of government was critical to the
success achieved in management of milfoil in Minnesotao The Invasive Species
Program has also received valuable assistance from staff in DNR Fisheries and the
Aquatic Plant Management Program in Fisheries and the Division of Ecological
Resources.
Research on Eurasian Watermilfoil and Potential Approaches to
Management in Minnesota
The Invasive Species Program has supported or conducted a number of research
projects to improve management of milfoiL In this section, we briefly summarize
activities or results of recent efforts by researchers working primarily in Minnesotao
Potential spread of Eurasian watermilfoil
In 2007, Dr. Ray Newman continued working with Mso Sara Roley, his student, on a
manuscript entitled "Predicting Eurasian watermilfoil infestations in Minnesota," which
they submitted to Lake and Reservoir Management, the journal of the North American
Lake Management Society (Roley and Newman In Revision). In this manuscript, Dro
Newman and Ms. Roley describe the results of research conducted by the University of
Minnesota during 2004 with $35,000 provided by the DNR Invasive Species Programo
(3
Invasive Species in Minnesota
Annual RepOft for 2007
Table 16. Number of lakes, budgets, and expenditures in different classes of
management at Eurasian watermilfoil in Minnesota dlll'ing 200?
..1_0_.__
Number of
. ....la..k.~e.'5 in .class
uHI sprmg
Number or lakes in
class where control or .
assessment was done , Funds spent
Maintenance Management
Control by Cooperators and Reimbursed by DNR
i-d n~ 12J 122.0001
----.......-........----.--. -----............------.-.--
28
I
;",,~
3,000
Assessment by Cooperators and Reimbursed by DNR
.r --.1 11,000 Ln-
- - .
.n 2~J
! Control by DNR at DNR Public Water Access
J. nn:d~
n~1
14,000
Hi h-Intensity Management
... 01 Contingency L
3';'~1
139,000J
1
Totals
1_ nn C145~1---.
341
1 One of these lakes applied for funding in 2007, but does not plan to do the work until 20080
Chemical profiles of Eurasian and northern watermilfoils
In 2007, Drso Michelle Marko, Ray Newman and colleagues published a paper online on
the chemical profiles of Eurasian and northern watermilfoils (Marko et al. 2007).
Results of this study by the University of Minnesota indicated differences between the
two species. which may account, at least in part, for the ability of Eurasian watermilfoil
to displace certain native plants in North America.
Genetics of Eurasian, northern, and hybrid watermilfoils
In 2007, Dr, Michael Moody, a researcher at Indiana University continued to study the
genetics of Eurasian, northern, and hybrid watermilfollso Previously, he worked with a
private company to develop a library of microsatellite markers for Eurasian watermilfoil
and other watermilfoils (Moody 2005)0 Subsequently, the potential utility of the markers
was evaluated by analysis of samples of milfoils from two Minnesota lakes (Moody
2006). In 2007, Dr. Moody conducted additional and more extensive sampling of
milfoils in Minnesota lakes to further examine genetic variability using microsatellite
markerso A report on this effort will be forthcoming.
/.4
Invasive Species in lVlinnesot!J
Annual Repolt for 2007
Also during 2007, a study on the geographic distribution and genetic variation in hybrid
watermiifoil by Dr. Moody, which previously had been released electronically, was
published (Moody and Les 2007).
Ecolo~lica!
watermiifoil, hybrids between Eurasian and
northern
Recently, it has been observed in some Minnesota lakes with moderate to high water
clarity and much native vegetation that Eurasian watermilfoil or perhaps hybrids
between this species and native northern watermilfoil, M. sibiricllm (Moody and Les
2002, Moody and Les 2007), may have limited distributions and occur at low levels of
abundance Understanding variation in the distribution and abundance of an invasive
species like Eurasian watermilfoil is important to development of realistic expectations
of invasions and approaches to management. A reasonabie approach to addressing
this question would be to grow plants from different populations under uniform
experimental conditions (eog., Santamaria et aL 2003). Further, the experiments should
include both parental genotypes, as well as the hybrid, to provide a comprehensive
analysis of ecological performanceo
At the request of the DNR, the ERDC researchers agreed to undertake a study to
determine whether there are differences in the growth or physiological performance of
Eurasian, northern, and hybrid watermilfoils under varying environmental conditions at
the laboratory, mesocosm, and field leveL This research is in progress and results will
be reported to the DNR in the futureo
Research on approaches to control of Eurasian watermilfoil
Potential to apply two herbicides at low rates to control both Eurasian
watermilfoil and curly-leaf pondweed
In Minnesota during 2007, ERDC researchers agreed to undertake a study begun in
2003 to determine whether early spring treatment with low rates of endothall and 2,4-D
herbicides will control both milfoil and curly-leaf pondweed (Skogeboe and Getsinger
2006)0 The researchers also want to determine whether reductions in milfoil and curly-
leaf will produce a more diverse and abundant native plant communityo Lastly, the
project is intended to determine whether the expected shift in vegetation will affect the
fish community. One paper on the composition of the fish communities in the four study
lakes was published by Slade et aL (2005)0 The study is being conducted by the ERDC
in cooperation with Mississippi State University and the DNRo United Phophorous Inco
(formerly CerexAgri), an herbicide manufacturer, provided financial and technical
support in past years. The lakes were treated in spring, 2007 for the fourth year:
endothall (1 mg/L ail combined with triciopyr (0.5 mg/L ail were applied in May.
Monitoring of the vegetation was done during the open water season of 2007.
Additional written results are expected to be reported to the DNR in the futureo
75
Invasive Species in Minnesota
Annual RepoJt for 2007
Susceptibility of selected species and hybrids of milfoil to aquatic herbicides
Recent documentation of hybridization of Eurasian (Myriophyllum spicatum) and
northern watermilfoil (Myriophyllum silJiricum) by Moody and Les (2002, 20(7) may
have implications tor management strategies including the Lise ot herbicides and
biological control In conjunction with the discovery of hybrid milfoils, there have also
been anecdotal reports of reduced activity of the herbicides 2,4-0 and fllwidone in the
upper Midwest Reduced efficacy of herbicides has been noted at sites that have been
managed over timeo WLlile this could simply be a matter of yearly variations in initial
plant vigor and environmental conditions on the date of treatment, the number of reports
from different locations suggests the potential for the development of increased
herbicide tolerance by a milfoil biotype.
In 2005, the DNR provided funding to the ERDe to support a study of potential variation
among different species and genotypes of milfoils in susceptibility to herbicides.
Results showed no significant differences between the hybrid and Eurasian watermilfoil
populations in their responses to herbicideo Complete results of this study and
recommendations were conveyed in a final report from the ERDC to the DNR
(Netherland et al 2006)0 Some results of the study were published by Poovey et al.
(2007) and Slade et al. (2007).
Research on an approach to limit spread of Eurasian watermilfoil
A study of the potential to use hot water to kill milfoil on trailered watercraft was
completed by Blumer (2007) at the University of Minnesota. The research focused on
fragments of milfoil that were exposed to six different water temperatures ranging from
45 to 80 oC for periods of two, five, and ten minutes. Exposure to water with
temperatures of::: 60 oC was necessary to kill milfoil fragments. Duration of exposure
had little effect at the temperatures tested. These results suggest that using hot water
alone to kill milfoil fragments attached to watercraft may not be feasible due to the high
temperatures required.
Future plans and needs for management of Eurasian watermilfoil
. Keep the public informed about milfoil and the problems it can cause
. Reduce the plant's spread by targeting watercraft inspection and enforcement
efforts in areas of the state where milfoil is present.
. Monitor the distribution of milfoil in the state with emphasis on verification of
reports of new occurrences. I
. Continue to improve our understanding of the ecology and management of milfoil j
76
Invasive Species in Minnosota
Annual Report for 2007
References Cited
Blumer, Dave. 2007. Can hot water be used to kill Eurasian watermiifoii? Plan B paper
submitted for Master at Science in Water Resources Science, University of
Minnesota, Saint Paul, [August]
DNR (Minnesota Department of I~atural Resources). 20070 Control of Eurasian
waterrnilfoil in 2007 funds available from the Minnesota Department of Natural
Resourceso Unpublished document by the Minnesota Department of Natural
Resources, Division of Ecological Resources, Box 25, 500 Lafayette Road, Sf Paul,
MN 55155-4025.
DNR (Minnesota Department of Natural Resources). 2006. Assessment of Eurasian
watermilfoil in 2007: funds available from the Minnesota Department of Natural
Resourceso Unpublished document by the Minnesota Department of Natural
Resources, Division of Ecological Services, Box 25, 500 Lafayette Road, St. Paul,
MN 55155-4025
Marko, Mo D., E.M. Gross, R. M. Newman and F. K. Gleason 20070 Chemical profile of
the North American native Myriophyllum sibiricum compared to the invasive M.
spicatum Aquatic Botany [http://dxodoLorq/100 1 016/i.aquabot.2007.08.007]
Moody, ML 20050 Microsatellite markers for genotyping of invasive watermilfoil.
Unpublished report submitted by Indiana University, Department of Biology,
Bloomington, IN 47405 to the Minnesota Department of Natural Resources, 500
Lafayette Road, St. Paul, MN 55155-40250
Moody, ML 20060 Microsatellite markers for genotyping of invasive watermilfoil. Part
II. Unpublished report submitted by Indiana University, Department of Biology,
Bloomington, IN 47405 to the Minnesota Department of Natural Resources, 500
Lafayette Road, St Paul, MN 55155-4025.
Moody, ML, and D.H. Les. 2002. Evidence of hybridity in invasive watermilfoil
(Myriophyllum) populations. Proceedings of the National Academy of Science
99(23):14,867 -14,871.
Moody, ML, and D.Ho Leso 20070 Geographic distribution and genotypic composition
of invasive hybrid watermilfoil (Myriophyllum spicatum X M sibiricum) populations in
North America. Biological Invasions 9:559-570.
Netherland, Michael Do, Angela Poovey, and Jeremy Sladeo 2006. Evaluation of the
susceptibility of Eurasian, northern, and hybrid watermilfoil to three aquatic
herbicides. Draft: Final Report prepared by the U.S. Army Engineer Research and
Development Center, Center for Aquatic and Invasive Plants, Gainesville, FL for the
Minnesota Department of Natural Resources, Division of Ecological Services, 500
Lafayette Rd, Saint Paul, MN 551550 [October]
Poovey, AGo, JoG. Slade, and M.D. Netherlando 2007. Susceptibility of Eurasian
watermilfoil: (Myriophyllum spicatum) and a milfoil hybrid (M. spicatum x M
sibiricum) to triciopyr and 2,4-D amineo Journal of Aquatic Plant Management
45:111-1150
Roley, SoSo and RMo Newmano In revision. Predicting Eurasian watermilfoil infestations
in Minnesotao Lake and Reservoir Management [November 2007]
Santamaria, L,J. Figuerola, J.J. Pilon, Mo Mjelde, AJ Green, T. de Boer, RA King,
and R.J GornalL 20030 Plant performance across latitude: the role of plasticity and
local adaptation in aquatic plants. Ecology 84:2,454-2,461.
7"7
Invasive Species in Minnesota
Annual Repalt far 2007
Skogeboe, J.Go, and KD. Getsinger. 20060 Selective control of Eurasian watermilfoil
and curly-leaf pondweed using low doses of endothall combined with 2,4-0. UoS.
Army Corps of Engineers, Engineer Research and Development Center/ Technical
Note, Aquatic Plant Control Research Program Chemical Control-050 Waterways
Experiment Station, 3909 Halls Ferry Road, Vicksburg, !VIS 3\1180-6199.
Skogeboe, J. ,and C. Wellingo 2007 L.ake Minnelonka Aquatic Herbicide
Demonstration Project. Draft Final Report. UoSo Army Engineer Research and
Development Center, Eau Galle /\quatic Ecology Laboratory, Spring Valley, WI
5476'1 and Minnesota Department of Natural Resources, Division of Ecological
Resources, 500 Lafayette Rdo, Saint Paul, MN 55155
Slade, J.G., EoDo Dibble, and PC Smileyo 2005. Relationships between littoral zone
macrophytes and the fish community in four urban Minnesota iakes. Journal of
Freshwater Ecology 20(4): 635-6400
Slade, J.G., AG. Poovey, and MoO Netherlando 200'10 Efficacy of fluridone on
Eurasian and hybrid watermilfoilo Journal of Aquatic Plant Management 45: 116-
118.
78
"
)
servimr the
".J
Silver Lake Aquatic Plant Survey
Ramsey County, MN
May 14-15, 2007
June 11, 2007
August 13, 2007
October 25, 2007
Prepared by Carolyn Oindorf
and Katie Schonhorst
i'l ::,:, !',jarnci
;VI:'\) bS?.!i.C .T (?G ,Vj/2<'"it;,CiS
Attachment 6
"
Table of Contents
Tables and Figures.".."........".....".......... "oo" ,,0 "......0.. 2
Introduction. ...... .0""'"." .......".. ......... . "3
Lake Descrlptiollo ."......... .3
Purpose ".."..0" .........0..... .. ..... 3
tJlethods, . ., "<".<H'. ,~1
Results .............0.. "......0."...."0 ".8
Non.native Invasive Species 0... ... ."........ "'1
Other Non~natlve Invasive Species....................o.o 0....0. .......0 ...0...... 11
Emergent Species........... ........0".....0.."...........0....11
Biomass Samples ......0.......... 0...0............. .....1 j
Shoreline Features and Lake Use. 0.""."0..... 0"."............ .... "..14
Discussion."..... .................0" ................................................. 0" 15
References..o ..." 0 ".... 0.. ,,' ". 0 ........ ....0.."..... .. "0'0' 0 0 0'''" .."... ....... ..".. 0 ...... 0... 0"" 15
Tables and Figures
Tables
Table 1 Silver Lake Dominant Submersed Species 2007
Table 20 Silver Lake Plant Species Occurrence
Table 3. Silver Lake Plant Species Occurrence to the ten-foot depth
Table 4. Silver Lake Aquatic Plant Relative Abundance
Table 50 Silver Lake Frequency Categories
Table 60 Silver Lake Submersed Species Averages
Figures
Figure 1. Silver Lake Depth Map
Figure 2. Silver Lake Aquatic Vegetation Coverage
Figure 3. Silver Lake Survey Points, invasive species and other features
Figure 4. Silver Lake Eurasian watermilfoillnfestatlon
Figure 5. Plant Occurrence by Water Depth
Figure 6. Silver Lake Emergent Species Stands
Appendices
A-Coo Survey data sheets
D.F. Biomass sample sheets
2
Introduction
FOllin Consulting, Inc. (Fel) was hired by the Minnesota Department of Natural Resources
(MnDNR) to conduct an aquatic plant survey on Silver Lake. The purpose at the survey is to
collect monitoring on lakes funded for treatment by the MnDNR grant pm!:lram "Pilot
projects to control curly~leaf pondweed or Eurasian watermilfoil on a lake-wide basis for
ecological benefits" The survey was conducted on May 14 and 15, June 11, and August 13,
2007 by Carolyn Dindolf, Katie Schonhorsl, 2nd Roman Rowan.
Hours spent on the lake completing survey (2 person crew) 0
May 14: 12.75
May 15: 5.0
,June 11: 13.0
August 13: 11.0
Plant identification was completed by Carolyn Dindorf and Katie Schonl1orst
Lake Description
Silver Lake (East) is a 72~acre lake located in North Sf. Paul, Ramsey County, Minnesota (DNR
ID # 62-0001). About 71 acres or 99% of the lake is classified as littoral (<15' deep)o The littoral
zone generally defines the area where aquatic plants are likely to be found (Figure n Silver
Lake exhibits fair water clarity, with a summer average of 2.5 meters (7.9 feet) in 2006. The
Silver Lake map indicates a maximum depth of 18 feet, however a maximllm depth of 23 feet
was found during the survey. The mean depth, estimated from the 150 sample point depths
found during the survey, is 7.3 feet. Silver Lake has an irregular oblong shape with a peninsula
on the north edge and a large inlet on the west edge. The lake has a muddy bottom, but a more
sandy shoreo A County park on the north shore includes a concrete boat launch. The City park
land on the south shore includes a picnic area and fishing pier. The City also has a public beach
in the southwest corner of the lakeo
Eurasian watermilfoil (EWM) was first confirmed in Silver Lake in 19920 Curly-leaf pondweed is
also present in the lake.
Purpose
The purpose of the survey was to collect data on the aquatic plant community in Silver Lake by
conducting three separate point-intercept surveys in 2007; immediately following a chemical
treatment for Eurasian watermilfoil and curly-leaf pondweed in the early spring, at the time of
peak biomass in June, and at the expected peak native plant biomass in late summer to:
a. identify the location, abundance and extent of Eurasian watermilfoil
bo identify the location, abundance and extent of curly~leaf pondweed
c. identify the location and abundance of native plants in the lake
d. Use this information to help guide future control efforts
Methods
The survey was conducted using the point-intercept protocol as required by the Minnesota
Department of Natural Resources (DNR) (Crowell, 2006) and based on
Madsen (1999). A map was generated by Fel using Map Source software with GPS
coordinates of the survey points provided by the MnDNR (Figure 2). A Garmin Map76Cx GPS
was used to locate the survey points. Depths were measured using a scaled rod for up to 110
feet Deeper depths were measured using an Eagle depth finder. Where a depth could not be
3
determined due to plant interference, it was recorded as ">11.4 feet", the length of the rod. At
each survey point a double headed rake sampler on a rope was thrown and retrieved to the
boat. All the plant species found on the rake were recorded 0 Samples not identified in the field
were bagged and labeled for further identification and C''onfirmationo Plant abundance was
determined for each species based on a scale of 1 - 4, with 4 being the most abundant.
Sampies were collected for all points out to one survey poinl beyond where plants were foundo
A total of 150 survey points were sampled per surveyo F'lants that were observed were noted on
the survey floaling and emergent plants were recordedo A of
each was and
Pre-determined, randomly sele,cled biomass samples were collected at 38 of the 150 survey
points (Figure 3) using the protocol described by the DNR (Crowell, 2007)_ A singie headed rake
at the end of an extended pole was lowered, perpendicular to the water surface, down to the
sediment at the lake bottom. The rake was then rotated on its axis three full turns and slowly
pulled up toward the water surface while continuing to turn it slowly to pre\lenlloss of collected
plants. The plants were collected, bagged and brought back to the office where they were
sorted and bagged by species for later drying and weighing. Samples were frozen after sortingo
Transparency was measured using an 8" white Secchi disk and measured from the shady side
of the boat at the deepest area of the lake.
A
T
\
"
\
I 6
w.a~r':::mJ co.
(~~~~~)
\\.. "'.j'
~~
II>
5_00 !l!:ACH
-..w4>-SE
~
'"
:t
'"
11
R.2Z:W Aetw
Figure 1. Silver lake Bathymetry (www.dnr.state.mn.usllakefind/results.html)
5
r';A"'f,")OF
Figure 2. Silver Lake Aquatic Plant Survey Points
6
,!" 1 ~j._";I' ,W'.' 'i :1
'*'
,
I
I
J
i
,
i
, i,
"
'-.'
Figure 3. Silver Lake Biomass Sample Points
'Ji,! ,
7
-n.';-',
',J_" ,
Results
Aquatic plants were found in 142 out of 150 survey points on the lake in May and August and at
145 survey points in June (Figure 4"6). Twenty different aquatic species were sampled m
observed in Silver Lake throughout the three surveys. Native plants were round throughout
Silver l.ake in water up to 16.6 f!3et in May, 20.1 feet deep in June, and 20.1 reet deep in
August (survey point 1 1 08 The (Appendix list th"
aquatic plant species round in Silver Lake at each sllrvey point for each survey dateo Dominant
species per survey are shown in Table 1. All others were round in less than 10% ofihe survey
points. Percent occurrence and relative abundance, on a scale of 1 - 4, are also shown in
Table 1.
TaiJ1e 1, Silver Lake Dom!I1~,-tSubm_e!sed Specie.s 2.0()7~.0___~
May 14.15 June 1
Latin Name
Ceratophyllum
demersum
Elodea
canadensis
Lemna trisulca
Myriophyllum
sibiricum
Myriophyllum
spicatum
Najas flexilis
potamogeton
W
Potamogeton
crispus
Ranunculus s
Common Name
Goontail
Canada waterweed
Star duckweed
Northern milfoil
Eurasian watermilfoil
Bushy Naiad
Narrowleaf pondweed
Curly-leaf pondweed
Water crowfoot
# %
occur occur
108 7305
37 25.2
19 1209
15 10.2
86 58.5
16 1009
2 1A
94 6309
20 13.6
#
occur
%
occur
#
occur
August 13
%
occur
136
91.3
118
7902
46
48
30.7
3200
81
41
27.5
11
10
7
n
6.7
4.7 I
~
3A
16
47.0
10.7
12.1
2
Several floating-leaved species were observed. White waterlily (Nymphea sp.) was found at
four sites in May, three sites in June, and four sites in August Spatterdock (Nupharsp.) was
found at one site in August. Duckweeds, Lemna minor and Lemna trisulca, were observed at
several sites. The only emergent species observed at a sample point was a dense stand of
cattails (Typha sp.) at site 69 near the boat landingo The native plant community was very
diverse in most of the lake at the time of the May survey; however, after the chemical treatment,
the diversity declined in the fOllowing two surveys. Table 2 shows the frequency of occurrence
for all of the plants identified throughout the three surveys, and Table 3 shows the frequency of
occurrence for all the plants identified to the ten-foot depth 0
2.0
Relative abundance on a scale of 1 to 4 is listed in Table 4. Most species were round at an
abundance level of '1 - 2. However, Myriophyllum spicatum, Potamogetol1 crispus and
Ceratophyllum demersum were found in abundance (level 4) at several sites.
Water temperature and transparency measurements were taken on each survey date. A Secchi
disk transparency of '10.0 feet was measured at 11:05 aol11o on May 14, 7.75 feet at 2:25 p.m. on
June 11, and 0.3 feet at 10:30 a.m. on August 13. Surface water temperature was 640F on May
14, 78"F on June 101 and GOOF on August 13.
g
Table 2. Sillier Lake Plant Species Occurrence
May 14-15 June 11 August 13
# % # % # %
Common
_________~_~_______.__()_"Cll~OCClJr ._Occur O<:l:ur__. O_I:~':'~o O~<:'!~
Br<Jsenia schreberi Watershield 1 0 7%
Ceralcphylium demer,sum Coonlail 108 730&%
sp: Mus~grasses 5 3.4%
Eleochar/s ~p. Spike rush 3 2.0%
Elodea canedensis Canada walerweed 37 252%
Lemna minor Duckweed 2 1 A%
Lemna trisulca Star Duckweed 19 1209%
Myriophyllum slbiricum Northern watermilloil 15 102%
Myriophyllum spicatum Eurasian watermilfoii 86 58.5%
Najas flex/lis Bushy naiad 16 10.9%
Nitelfa sp. Stonewort 3 200%
Nuphar spo Spatterdock
Nymphaea odorata American white waterlily
Nymphaea tuberosa White waterlily
Potamogeton amplito/ius Large-leaf pondweed
potamogeton spo Narrowleaf pondweed
P. crispus Curly-leaf pondweed
P praelongus White-stem pondweed
Ranunculus spo Water crowfoot
Typha sp. Common cattail
Table 3.
Latin
Common
Watershield
Coontail
Muskgrass
Spike rush
Canada waterweed
Duckweed
Star duckweed
Northern watermilfoil
Eurasian watermilfoil
Bushy naiad
Stonewort
Spatterdock
American white wateriily
White waterlily
large-leaf pondweed
Narrowleaf pondweed
Curly-leaf pondweed
White-stem pondweed
Water crowfoot
Common cattail
Brasenia schrebe/i
Ceratophyllum demersum
Chara spo
Efeocharis spo
Elodea canadensis
Lemna minor
Lemna trisulca
Myriophyllum sibiricum
Myriophyllum spicatum
Najas flexi/is
Nitella sp.
Nuphar sp.
Nymphaea odorata
Nymphaea tuberosa
Potamogeton amplitolius
potamogeton
Potamogeton crispus
Potamogeton praelongus
Ranuncufu$ spo
.-Typha sp
792%
103%
54.4%
2 1.3%
41 2705%
5 34%
70 4700%
16 10.7%
2 103%
2 1A% 1 007%
2 1.4% 2 1,3%
8 5.4% 8 5A%
2 1.4% 18 1201%
94 6309% 3 2.0%
3 200%
20 1306%
1 007%
2 106%
2 106%
8 6.6%
2 106%
75 6105%
3 205%
20 164%
1 008%
98
2
78.4%
1.6%
Silver Lake Plant Species Occurrence to the ten-foot depth
May 14-15 Junl!11
# % # %
Occur Occur Occur Occur
1 008%
92 75.4%
5 4.1%
3 2.5%
34 27.9%
2 106%
19 1506%
15 1203%
66 54.1%
16 1301%
3 2.5%
69 552%
2 106%
39 312%
4 32%
52 4106%
16 1208%
2 106%
1
2
8
12
2
0.8%
1.6%
6.4%
906%
01,6%
i36 9~1.3%
3 2.00/0 i
I
-- .
46 30.7% I
6 4.0%
48 3200%
1.1 703%
10 6.7%
1 0.7%
4 207%
7 407%
7 407%
2 103%
1 0.7%
August 13
# %
Occur Occur
127 9200%
3 22%
46 3303%
6 403%
48 34.8%
11 800%
10 72%
1 0.7%
4 209%
7 501%
7 5.1%
2 1.4%
1
~9.~!Y2._.__1-21'~'L
9
Table 4. Silver Lake Aquatic Plant Relative Abundance
~iative abundance
Latin Common Ma June Aug
Brasenia schreberi Watershield 1.0
Ceratophyllum demersum Coontail 1,6 1.4 17\
Cliiir8 $po Muskgr8ss 1.4 2.0 2,0
Eleocharis sp. Spike Rush '1,0
Elodea canadensis Canada wattlrweed 10 12 1.1
LemnrJ minor Duckw,,'ed .1.0 105 "1.:3
Lemna trisulca Star dUGK\Meed 1.0 1.0 1.1
,ollyriop/;ylfum sibiricum Northern watermilfoil '12 1.0
Myriophyllum spicatum Eurasian waterm!lfoil 1.9 1.3 10 I
Najas flexilis BusilY naiad 1.9 1.1 '11 I
Nilel/a spo Stonewort 1.0 1.0 ,
I
Nuph8r spo Spatterdock 2.0 I
Nymp/J8ea odorala American white waterliiy 10 2.0
Nymphaea tuberosa Wnite waterlily 100 1.5 3.0
Potamogeton ampfifofius Large-leaf pondweed 1.1 1.0 100
Po/amogeton spo Narrowleaf pondweed 1.0 100 1.0
Potamoge/on crispus Curly-leaf pondweed 103 1,0 1.5
Po/amogeton praelongis White-stem pOhdweed 1.3
Ranuncu/us spo Water crowfoot 1A
T ha s 0 Common cattail 4.0 1,0 100
Frequency of occurrence was calculated as the number of points where the plant species was
found divided by the number of points at, or above maximum plant depth for the date of the
survey. The data reflects that the invasive species declined and the native species increased
after the chemical treatment at Silver Lake (Table 5). Many specimens of Myriophyllum
spicatum observed during the June survey were dead or dying.
Table 5. Siiver Lake Frequency Categories
Categories
Frequency of all Macrophytes
Frequency of native Macrophytes
Frequency of all submersed plants
Frequency of native submersed
Frequency of invasive submersed
Frequency of Po/amogeton genus
Frequency of floating and emergent plants
Maximum depth of vegetation growth(feet)
May 14-15 June 11 Augusl13
97% 97% 95%
85% 94% 95%
97% 96% 95%
85% 93% 95%
85% 48% 9%
66% 19% 9%
15% 29% 38%
1606 20.1 2001
--~
Table 6. Silver Lake Submersed Species Averages
Categories
Average # of submersed native species per survey point with
standard error
L~age # of all SUb~-nerse~peCies per surv:~oint with standard
May 14-15
107+/-0.10
! 2.9+1- 0010
[~-------
August 13
1.8+/- 0.05
1.8+/-0.10
10
NOI1.flativefnvasive Species
Eurasian watermilfoii
Eurasian watermilfoil (MyriopfJyllum spicatum) was found at 86 survey points (58.5%) in May, 70
(4"7.0%) in June, and 11 (703%) in August (See Figures 4-6)0 EWM was found in water up to
15.8 feet deep~
Curly-leaf pondweed
Curly-leaf pondweed (Potamogetol1 crispus) was found at 94 survey points (6309%) in May, 3
(200%) in June, and 2 (103%) in August 4-6)0 it was found in water up to 01606 feet
deep.
Other Non-native Invasive Species
Although not found as part of the survey sampling, Yellow Iris (Iris pseudacorus) was observed
along the shoreline just to the east of the public access near site 103 and Purple Loosestrife
(Lythrum salicaria) was observed on shore near sample point 130 during the August survey.
Emergent Species
A large stand of Cattail (Typha sp.) was recorded and is shown on Figures 4-60 Floating-leaved
waterlily and Spatterdock stands are shown in Figures 4- 6 as well.
Biomass Samples
During each of the three surveys, samples were collected for biomass measurements to be
completed by the DNR. All samples were bagged and sorted and identified back in the officeo
Appendices D-F list the species found in the biomass samples. A few of the biomass samples
did not yield any plants. Field staff noted that the regular sample collected did not always match
the biomass sample in number and type of species.
11
"-
dj
u
~
Figure 4. Silver Lake Aquatic Plant Survey May 14-15, 2001
12
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t
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Figure 5. Silver Lake Aquatic Plant Survey June 11, 2007
',_'i
13
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Figure 6. Silver Lake Aquatic Plant Survey August 13, 2007
Shoreline Features and Lake Use
There are two public water accesses located on Silver Lake. There is a concrete boat launch
on the north edge of the lake, and a wooden fishing pier on the west edge. A large roped-off
swimming beach is located within the park. Survey point 8 was not sampled on the second and
third surveys because it was within the marked swimming area which was being used. Century
Avenue runs along the east side of the lakeo Private residencas with varying landscapes
surround most of the lake. The County land on the north includes a forested area, the public
boat launch, and some grassland with trees. The City land is mowed lawn with picnic areas.
The following recreational activities were observed: swimming, personal watercraft use,
canoeing, boating, and fishing.
14
Discussion
In general, Silver Lake has a fairly diverse aquatic plant community. Twenty-one different
species were found in the lake throughout the three surveys. Eurasian watermilfoil was first
found in Silver Lake in 1992. The native plant community and recreational use of the lake is
threatened by the spread of this invasive exotic species. In addition to Eurasian watermilfoiL
Curly-leaf pondweed is a threat to healtll the lake It was a dominant in Silver
Lake.
lhe average summer Secchi disk transparency was meters in 2006 ranging from 008 meters
to :3.5 meters (MPCA data). The three measuremrjnts taken in 2007 during the survey ranged
from .1 meter to 3.0 meters, witrl an average of 1.8 meters. Two surveys were contracted by the
DNR and conducted in 2006 (Barr Engineering, 2006). The species found were similar to those
found during the 2007 survey. However, Potamogeton zosteliformes, Potamogeton richardsonii
and Zostareila dubia were found in 2006, but not in 200l and Lemna minor, Typha, Brasenia
schreberi and Nupharwere found in 2007, but not in 2006.
There was an obvious change in vegetation composition and density between the lake
treatment before the first survey in May to the third survey in August. Eurasian watermilfoil and
curly-leaf pondweed declined substantially following the herbicide treatment Several of the
native species also declined. The frequency of occurrences listed in Table 50 Indicate that
natives increased following the treatment. Although this is true, the diversity of natives was
lowered. The Potamogeton genus which included three native species in addition to P. crispus,
decreased from 66% occurrence in May to 9% in August. Ranunculus dropped from 13.6% in
May to 0% in August Table 5 shows that Coontail (Ceratophy/lum demersum) increased its
number of occurrences; however, the plant abundance per occurrence droppedo Star duckweed
(Lemna trisulca) increased in both occurrence and abundance. The herbicide treatments
appeared to be effective on the target species, but also affected the native specieso
References
Barr Engineering. 2006. Silver Lake Macrophyte Data, June 7 and July 27, 20060
Crowell, W. 2006. Protocols for aquatic plant surveys accepted by the Minnesota Department of
Natural Resources for the collection of pre-treatment data for the MN DNR grant program "Pilot
projects to control curly-leaf pondweed or Eurasian watermilfoil on a lake-wide basis for
ecological benefits"o April 13, 2006.
Crowell, W. 20070 Attachment A. Sliver Lake, Ramsey County, Aquatic Plant Surveyso
Attachment to contract with Fortin Consulting.
Minnesota Department of Natural Resourceso Silver Lake Map, 19930 500 Lafayette Rdo, Sl.
Paul, MN 55155.
Madsen, Jo D. (1999). "Point intercept and line interceptll1ethods for aquatic plant
management." APCRP Technical Notes Collection (TN APCRP-M1-02). U.S. Army Engineer
Research and Development Center, Vicksburg, MS.
www.wesoarmy.millel/aqu80
15
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MEMORANDUM
Agenda Item 9.a.
TO:
FROM:
SUBJECT:
Environmental and Natural Resources Commission
Shann Finwall, AICP, Environmental Planner
Resolutions of Appreciation for Margaret Behrens, John Mason, and Tom
Moibi
May 14, 2008 for the May 20 Environmental and Natural Resources Commission
Meeting
DATE:
Attached are resolutions of appreciation for Margaret Behrens, John Mason, and Tom Moibi for
the following service to the Environmental and Natural Resources Commission:
. Ms Behrens served as a commissioner for one year and three months, from
November 30, 2006 to March 11, 20080
. Mr Mason served as a commissioner for two months, from November 30, 2006 to
February 7, 2007.
· Mr Moibi served as a commissioner for nine months, from November 30,2006 to
September 4, 2007.
Staff requests that the Environmental and Natural Resources Commission recommend that the
city council adopt these resolutions of appreciation 0
Attachments:
Resolutions of Appreciation
1. Margaret Behrens
2. John Mason
3. Tom Moibi
Attachment 1
RESOLUTiON Of' APPRECIATION
1Y1lEREAS, Margaret Behrens has been a member of the Maplewood
Environmental and Natllral Resources CommissioJl jor olle year alld three mOllths,
ji'Olll November 30,2006 to March 11, 2008, and has servedfilithfully ill that
capacity; aud
WHEREAS, the Ellvimillllental and Natural Resources Commission JutS
appreciated her experience, insights and goodjudgment; ami
WHEREAS, Ms. Behrens has freely given of her time and energy, without
compensation, for the bettermellt of the City of Maplewood; and
WH1!,'REAS, Ms. Behrens has shown dedication to her duties and has
c01lsistently contributed her leadership and eflorifor the benefit of the City.
NOW, THEREFORE, TT TS HEREBY RESOLVED for and on behalfof
the City of Maplewood, Minnesota, amI Its citizens that Margaret Behrens is hereby
extended our gratitude and appreciation for her dedicated service.
Passed by the Maplewood
City Council on
Diana Longrie, Mayor
Passed by tire Maplewood
Environmental and Nawral
Resources Commission on May 6, 2006.
Ginny Yingling, Chailperson
Attest:
Kareu Gullfoile, City Clerk
Attachment 2
l?ESOLUTlON OF APPRECIATION
WHEREAS, John Maso" has been a member of the lilaplewood
Environmental alld Natural Resources Commission for two months, ./i'om
November 30,2006 to February 7, 2007, aud has servedfaithjillly in that capacity;
and
WHEREAS, the Environmental and Natural Resources Commission has
appreciated his experience, insights and good.iudgment; and
WHEREAS, Mr. Mason has fi'eely given of his time and energy, without
compensation, for the beltermellt of the City of Maplewood; and
WHEREAS, Mr. Masou has shown dedication to his duties and has
consistently contributed his leadership and effort jor the beuefit of the City.
NOW, THEREFORE, ITIS HEREBY RESOLVEDfor aml on behalfof
the City of Maplewood, Minnesota, and its citium that John Mason is hereby
extended our gratitude and appreciation fill' his dedicated service.
Passed by the Maplewood
City Council on
Diana Longrie, Mayor
Passed by the Maplewood
Environmental alld Natllral
Resources Commission onllfay 6, 2008.
Ginny Yingling, Chairperson
AI/est:
Karen Guiljoile, City Clerk
Attachment 3
RE'>'OL UTION OF APPRECIA nON
WHE1{f,"AS, Tom Moibi has been a member of the Maplewo()ll
Environmental alld Nlltuml Resource, Commission for IIilte moltths, frolll
November 30, 2006 to September 4, 2007, and has served faithfidly ill that capacity;
and
WHEREAS, the Environmental and Natural Resources Commission has
appreciated his experience, insights and good}udgment; alld
WHEREAS, Mr. Moibi has freely given of his time and energy, without
compensation, for the bel/eY1nent of the City of Maplewood; and
WHEREAS, Mr. Moibi has shown dedication to his duties and has
consistently contributed his leadership and effortfor the benefit of the City.
NOW, THEREFORE, IT IS HEREBY RESOLVEDfor and on behalf of
the City of Maplewood, Minnesota, and its citizens that Tom Moibi is hereby
extended our gratitude {lIld appreciationfor his dedicated service.
Passed by the Maple/Mod
City Council on
Diana Longrle, Mayor
Passed by the Maplewood
Environmental and Natuml
Resources Commission on May 6, 2008.
Ginny Yingling, Chairperson
AI/est:
Karen Gui!foile, City Clerk
Agenda Item 9.c.
MAPLEWOOD NATURE CENTER REPORT FOR THE
ENVIRONMENTAL AND NATURAL RESOURCE COMMISSION REPORT
March -April 28. 2008
Man~Il-Apl'il, 2008 Public Pn'gnull Attemhmce:
Name
Date
Number
Adult Seminars and Monitoring:
I. Landscaping with Native Plants
Saturday, March 1 3D
Wednesday, March 5 3D
Saturday March 8 5
Thursday, March 2D 27
Monday, March 31 6
2. Native Trees and Shrubs
3. Bluebird Workshop
40 Living on the Water's Edge
5. Frog Monitoring
Special Events:
Adopt A Park for Clean Up
Saturday, April 19
85
Fourteen groups adopted ten parks. This was quite a bit more successful than last year.
Family Programs:
1.
Build a Bat House
Saturday, March 22
16
2.
Spring to Your Senses Puppet Show Thursday, March 2D
17
Preschool/School/Service Learning Programs:
March: One school program scheduled. Due to fantastic snow conditions there have been many Saturday
rentals of snowshoes.
April: Two preschool groups scheduled.
m'_~"~'-
Staff is working with Edgerton and Weaver Elementary Schools to plant several city rain gardens.
Included in this are two classroom ontreaehes where naturalists teach about watersheds, storm water
runoff and rain gardens 0
Staff is working with Eastern Hcights Elementary School to provide threc grants funded birding field
trips.
Century College Ecology Labs (24-30 stlldcnts) do service projects at Neighborhood Prcscrves and the
Nature Center.
Miscellaneous:
1. Maplewood City Environmental Newsletter Insert. Staff has been working with Shann Finwall,
Environmental Plmmer, and Virginia Gaynor, Open Space Coordinator on creating a new city-
wide environmental newsletter.
2. Grants Submitted. Naturalist .Ian Hayman submitted a DNR grant for trail improvements to the
nature center for 2009. Maplewood Nature Center received mini-grmlts from the St.Paul Audubon
and Minnesota Native Plant Society for three sixth grade field trips to the Nature Center. Last fall
a grant was submitted to the National Science Foundation by U ofM extension with Maplewood
Nature Center as one of eight partners for linking engineering and nature for middle school youth.
3. Friends of Maplewood Natureo Staffis working closely with friends on fundraising goals and
activities. Friends are looking for interested members and volunteers. If interested please call the
Nature Center for a brochure, or check ont the Friends info on the city websiteo
4. April 28, 2008, the Maplewood Naturc Center Held a Goal-Setting Mecting. Following arc the
2008 Nature Centcr Goals:
a. Establish a comprchensive tree progranl for the city.
b. Improvc the city's websitc to create a tool for disseminating infoDnation on environmental
issues and conccrnso
c. Establish an intemal city recycling and procurement policy that reduces waste and
improves cost cfficiencyo
d. Establish a rain banel program for the city in conjunction with the watershed district
eo Secure additional grant opportunities
f. Continue working with staff on the city campus plan.
g. Create a Mobile "What saves Watts" Energy Bike exhibit to improve visitation to the
Nature Center. This exhibit can also be taken to schools and special cvents.
h. Finish and implement the Nature Center yard and parking lot improvements to demollstratc
best environmental management practices.
2