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Home My WebLink About2022-09-19 ENR Packet AGENDA CITY OF MAPLEWOOD ENVIRONMENTAL AND NATURAL RESOURCES COMMISSION Monday, September 19, 2022 7:00 p.m. Maplewood City Council Chambers 1803 County Road B East 1.Call to Order 2.Roll Call 3.Approval of Agenda 4.Approval ofMinutes: a.August 15, 2022 5.Unfinished Business a.Wetland Buffer Waiver, Xcel Energy, 1555 Century Avenue North 6.New Business 7.Visitor Presentations 8.Commissioner Presentations 9.Staff Presentations(oral reports) a.Harvest Park Native Seed Garden – Seed Harvesting Program (Tuesday, September 27, 6 to 7 p.m.) b.Resilient Cities and Communities – City/County Climate Action Conference (October 6) c.Reschedule October 17, 2022, ENR Commission Meeting Due to Staff Conflict (Suggested Dates Tuesday, October 25 or Wednesday, October 26) 10.Adjourn NJOVUFT DJUZ!PG!NBQMFXPPE FOWJSPONFOUBM!BOE!OBUVSBM!SFTPVSDFT!DPNNJTTJPO NPOEBZ-!BVHVTU!26-!3133 8;11!Q/N/ 2/DBMM!UP!PSEFS Bdujoh!DibjsqfstpoCszbo!dbmmfe!b!nffujoh!pg!uif!Fowjsponfoubm!boe!Obuvsbm!Sftpvsdft Dpnnjttjpo!up!psefs!bu!8;15!q/n/ 3/SPMM!DBMM Fnnb!Cspbeoby-!DpnnjttjpofsQsftfou Sfcfddb!Cszbo-!Bdujoh!DibjsqfstpoQsftfou Cfokbnjo!Hvfmm-!DpnnjttjpofsQsftfou! 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ENVIRONMENTAL & NATURAL RESOURCES COMMISSION STAFF REPORT Meeting Date September 19, 2022 Environmental and Natural Resources Commission REPORT TO: REPORT FROM: Shann Finwall, AICP, Environmental Planner PRESENTER: Shann Finwall, AICP, Environmental Planner Wetland Buffer Waiver, Xcel Energy, 1555 Century Avenue North AGENDA ITEM: Action Requested: Motion Discussion Public Hearing Form of Action: Resolution Ordinance Contract/Agreement Proclamation Policy Issue: Xcel Energy is requesting city approval of a conditional use permit, wetland buffer waiver, and a public vacation of an easement in order to construct improvements to its gas plant at 1555 Century Avenue North. The Environmental and Natural Resources Commission is being asked to review the wetland buffer waiver for wetland and tree impact mitigation strategies. The Environmental and Natural Resources Commission reviewed the wetland buffer and tree mitigation strategies during the August 15, 2022, meeting. The Commission tabled the item and requested additional detail on the mitigation strategies prior to making a recommendation. Recommended Action: Motion to approve the wetland buffer waiver for Xcel Energy’s gas plant improvements at 1555 Century Avenue North. Fiscal Impact: Is There a Fiscal Impact? No Yes, the true or estimated cost is $0 Financing source(s): Adopted Budget Budget Modification New Revenue Source Use of Reserves Other: N/A Strategic Plan Relevance: Community Inclusiveness Financial & Asset Mgmt Environmental Stewardship Integrated Communication Operational Effectiveness Targeted Redevelopment The city deemed the applicant’s application complete on August 5, 2022. The initial 60-day review deadline for a decision is October 4, 2022. As stated in Minnesota State Statute 15.99, the city is allowed to take an additional 60 days if necessary to complete the review. The Environmental and Natural Resources Commission reviews wetland buffer waivers to rectify impacts by reviewing and making recommendations for possible repair, rehabilitation, or restoration of the wetland buffer. Background: Xcel Energy is requesting city approval of a conditional use permit, wetland buffer waiver, and a public vacation of an easement in order to construct improvements to its gas plant located at 1555 Century Avenue North. The improvements would include: Improve the existing stormwater routing, storage, and discharge systems on-site while implementing precautions to decrease the risks associated with any liquid propane storage tank failure. Replace existing propane loading facilities with a new facility located to the north of the existing compound. The new facility will increase operational safety and efficiency at the plant. Install a new fire suppression system with a connection to a proposed water line in Century Avenue. Install new compressors, pumps, additional fire and gas detection systems, and electrical equipment to support the new equipment. Conditional Use Permit and Public Vacation of an Easement The facility at this site dates back to the 1950s, predating the city’s current requirements. The city’s ordinance now requires a conditional use permit for public and private utilities which can be located within any zoning district. The use of the site will be consistent with what has historically been on this site. The bulk of the proposed work will occur within the existing footprint of the facilities on site. However, the applicant will also be expanding the site’s footprint by about 30,000 square feet to the northeast in order to construct a new propane loading facility. This new area will include an 8-foot tall chain link fence running along the perimeter of the site, which will match the existing fence on site. There will also be expansion on the west side of the property for the construction of a detention pond. The applicant is requesting the public vacation of an easement that was originally taken for a road extension related to a proposed development in the late 1970s. This road extension was never constructed and the development occurred with a different layout that didn’t utilize this easement area for roadway purposes. The easement area does not contain any public utilities. The Engineering Department has no concerns with the proposed easement vacation. Wetland Buffer Waiver Ramsey-Washington Metro Watershed District has reviewed and approved the applicant’s wetland delineation. Wetland 1 is identified as incidental (manmade wetland with no wetland buffer requirements), Wetland 2 is identified as a Manage B wetland (50-foot minimum, 75-foot average wetland buffer), and Wetland 3 is identified as a Manage A wetland (75-foot minimum, 100-foot average wetland buffer). The applicant is requesting a waiver from the wetland buffer requirements for the expansion of the existing utility due to site constraints and new code requirements. The expansion will require the filling of the incidental wetland (Wetland 1) and grading to within 20 to 30 feet of the Manage A wetland (Wetland 3). The incidental wetland will be removed from the City’s wetland map, and no wetland regulations will apply. The proposal requires a 70 to 80-foot wetland buffer waiver for encroachments to the Manage A wetland. Tree Impacts The revised tree plan shows the removal of 82 trees during the construction of the project. City ordinance requires that the applicant either plant 82 2-caliper inch trees or pay into the City’s tree fund at a rate of $60 per caliper inch of tree that cannot be planted on site. Wetland/Tree/Landscaping/Wildlife Mitigation Strategies City staff met with Xcel Energy representatives after the August Environmental and Natural Resources Commission meeting and worked on a plan for detailed wetland, tree, landscaping, and wildlife mitigation strategies. Following is a description of those details and how Xcel Energy addressed them in the revised plans. Wetlands 1. Manage B Wetland: There is an existing gravel driveway on the north side of the property. That driveway encroaches to within approximately 50 feet of the Manage B wetland. Grading and construction of the detention pond will be within that existing gravel drive, and will not encroach closer to the Manage B wetland. Therefore, no additional impacts will occur next to the Manage B wetland and the condition to require wetland buffer mitigation around the Manage B wetland due to wetland buffer averaging is not needed. 2. Manage A Wetland: To mitigate the impacts to the Manage A wetland Xcel Energy will: a. Plant the bottom of the pond with plugs. The detention pond is lined with a membrane covered by soil so plantings may be limited depending on depth of soil. The revised plan state that the detention pond is covered by an impervious surface. No plantings are identified. The applicants must submit a detailed planting plan showing what types of plugs, seeds, or plantings are proposed for the bottom and sides of the detention pond. b. Plant the sides and top of the berm with native shrubs and trees. Add a combination of native plugs and seed. The revised plan shows 19 trees and 27 shrubs will be planted on the sides and top of the berm. A combination of native plugs and seed will be added. c. Remove all invasive buckthorn, honeysuckle, garlic mustard, etc. from the remaining Manage A wetland buffer within the Xcel Energy property. Treat buckthorn stumps and leave in place to ensure no erosion. Review options for native seeding, plugs, or shrubs for new undergrowth plantings. Invasive species will be removed and managed for three years. Native plugs and seed will be added in areas where invisive species have been removed. d. Add wetland buffer sign locations on the landscape plan. The revised plan identify wetland buffer signs installed every 150 feet around the Manage A and Manage B wetland buffer boundary. City standards include the placement of wetland buffer signs at least every 100 feet at a minimum. The applicants must submit a revised wetland buffer sign plan ensuring signs are placed a minimum of 100 feet apart. e. Add a note about three-year maintenance of the wetland buffer invasive species removal and native plantings. The revised plan includes a maintenance details. The applicants will also be required to sign a three-year maintenance agreement with the City prior to issuance of a grading permit. Trees 1. The large oak tree adjacent Century Avenue and another larger tree will be saved by shifting the fence to the west. The revised plans show the fence shifted to the west and three large trees preserved in that area (18-inch elm, 22-inch oak, and 27-inch oak). 2. Additional trees will be planted adjacent Century Avenue where there is space. The revised plans show eight trees planted on the east side of the property. 3. Review opportunities for adding trees to the top and west side of the detention pond berm, adjacent the Manage A wetland. This will help screen the use from the residential properties located on the west side of the wetland. Due to concerns about large tree roots compromising the detention pond berm, the revised plan shows 19 smaller trees and several bushes planted on the top and west side of the detention pond berm. 4. Xcel Energy will research opportunities for reuse of the wood from the trees, particularly the oak trees. The revised plans do not address this, but say that trees will be removed, stumps will be ground, and all wood and debris will be removed in accordance with local rules and regulations. The applicant must submit a plan for how the downed trees will be repurposed or recycled. Landscaping The revised plans appear to address all of the previous landscape requirements. However, further review is necessary by the City’s Natural Resources Coordinator who is out of the office at the time of this staff report. Any additional Natural Resources Coordinator comments will be presented during the Environmental and Natural Resources Commission meeting. Wildlife A neighbor of the site has reported that Sandhill cranes had been nesting within the wetland buffer adjacent the project last spring. Sandhill cranes are protected migratory waterfowl, but they are not listed as endangered, threatened or special concern. The applicants must submit a revised plan indicating that construction activity should not disturb or destroy active Sandhill crane nests and should be avoided from April through May. Department Comments Engineering Please see Jon Jarosch’s engineering report, dated August 8, 2022, attached to this report. Environmental The attached revised environmental review dated September 15, 2022, completed by Shann Finwall, Environmental Planner, details the wetland and tree impacts, and recommendations for additional mitigations strategies prior to issuance of a grading permit. Fire and Building No comments. Commission and City Council Review The Environmental and Natural Resources Commission reviewed the wetland buffer and tree mitigation strategies during the August 15, 2022, meeting. The Commission tabled the item and requested additional detail on the mitigation strategies prior to making a recommendation. The Planning Commission held a public hearing on August 16, 2022, to review the conditional use permit and public vacation of the easement. The Planning Commission recommended approval. The City Council will review the overall project during their September 26, 2022, City Council meeting. Citizen Comments Staff surveyed the 82 surrounding property owners within 500 feet of the proposed site for their opinion about this proposal. Staff did not receive any comments. Reference Information Site Description Campus Size: 19.73 acres Existing Land Use: Gas Plant Surrounding Land Uses North: City of Maplewood Open Space East: Vacant and Commercial Properties in the City of Oakdale South: Railroad Tracks and Rolling Hills Manufactured Home Park West: Ramsey County Open Space Planning Existing Land Use: Utility Existing Zoning: Light Manufacturing Attachments: 1.Overview Map 2.2040 Future Land Use Map 3.Zoning Map 4.Wetland Map 5.Applicant’s Narrative 6.Wetland Impact Map 1 7.Wetland Impact Map 2 8.Revised Grading Plan (8-31-22) 9.Revised Tree and Wetland Buffer Mitigation Plans (9-9-22) 10.Engineering Review 11.Updated Environmental Review (9-15-22) 1555 Century Avenue North - Overview Map July 22, 2022 City of Maplewood Legend ! I 0475 Feet Source: City of Maplewood, Ramsey County 2666!Dfouvsz!Bwfovf!Opsui!.!3151!Gvuvsf!Mboe!Vtf!Nbq Kvmz!33-!3133 Djuz!pg!Nbqmfxppe Mfhfoe ! 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GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG GGGGGGGGGGGGGGG x 3 1 - - 1.4% - % 7 1.3% .8%- -1. .3%0x x-2 1.7% - - GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG GGGGGGGGGGGGGGGGGGGG GGGGGGGGGGGGGGGGGGGGGGGGGGGGGG E x % 3 x . % 3 0 - . 2 x - % -1.0 x G G -1.0% x x % -1.3 0.7%G -G E G% G x -0.9%0x . 1 - G G x x 3% -1. % -1.6 % 5 .0%. -3 1 - -1.6% x E GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG GGGGGGGGGGGGGG x GGGGGGGGGGGGGGGG -3.0% GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG %G G 8 . -1.3% 0x - .6% -1 x414997.580CONTROL 1.6% - x E x G GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG G GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG1.0% - x -1.6% % -1.6% x0 . 1 %x - 6 . 1 - x E -2.3%G G x % -2.3% % 0 0 . x .x x xx x 1x x x 1x -x x %xx - x x %x x 8x x x 5x. x x .x x x 3 0 -x - 08/31/2022 x G G x PROFESSIONAL ENGINEERI hereby certify that this plan, specification, orreport was prepared by me or under my directsupervision and that I am a duly LicensedProfessional Engineer under the Laws of thestate of Minnesota.Signature:Typed or Printed Name: Isaac Francis CohrsDate: License Number: 59106 % x 1 . 1 x 1 - G G x x x % 5 . 0 - x x x 412989.300CONTROL % 5 x . 0 x - D2_4300_Maplewood Tank Bank IFC.dwg GU-MPG 4301 FACILITY 00 MAPLEWOOD / RAMSEY H O MAPLEWOOD PROPANE PLANT NORTHERN STATES POWER COMPANY TRUCK UNLOADING GRADING PLAN H O G G G G G G GG GG GGG NORTHERN FOFOFOFO FFOFOFOFOFO OFOFOFOFOFO OOH OH OHH OH HO HOFO OFOFOFOFOFOFO FOHOFOH FOHO FOFOFOHO FOFOOH HO HO HOOH HO G xxx GGG G GG GG xx G xxx xx G xx G GGG x x x x x x E x x x x x x E x x x 08/31/2022 x x xxxxx IFC07/20/2022IFC x E x x x x x x x x x % 8 . 0- % 5 . x 2 - % 2 .% 2 8 -. x % 1 - 7 . E 1 - x % 5 . 2 - x % 8 E . x 1 - % 1 . x 1 - E %x 8 . % E 1 7 - . x 0 % % 0- .% 2 - 5 3. . 2 1 - - E x E x 1ISSUED FOR CONSTRUCTION 0ISSUED FOR PERMIT % 8 . 1%9.1- E x - x 413CONTROL 1002.820 % E 6 % . 8 x 1. - 1 08/31/202208/31/202208/31/202208/31/2022 - x E 3.1% - x % 7 . 0MHM - x% IFC 3 JG . E 2 E - IFC x EEEEEEEEEEEEEEE -0.5% x % E 4 . 2 - x x EEEEEEEE x x E x x E x G G G G x G G G G x E x x E x x E x 08/31/2022 x PROFESSIONAL ENGINEERI hereby certify that this plan, specification, orreport was prepared by me or under my directsupervision and that I am a duly LicensedProfessional Engineer under the Laws of thestate of Minnesota.Signature:Typed or Printed Name: Isaac Francis CohrsDate: License Number: 59106 E x x E x x x E x x E x x G EG G G GG G x x D2_4301_Maplewood Truck Unloading IFC.dwg E G GGGG x G G x T X G SS S OH E x G GGGGGGGGGGGGGGGGGGGGGGG GU-MPG G x GGGGGGGG E x G G G x 82 A 17% 1356 Total Diameter (in) N 82 1:1 5428165 15% Trees Replacement RateTrees (@ 2" each) 120 60 18-245, COMMUNITY DEVELOPMENT 2022 FEE SCHEDULE 18-245§ § SCALE IN FEET 4501038238 0 PLAN: TREE PRESERVATION AND DIAMETER IN THE FIELD PRIOR TO CONSTRUCTION.ACCORDANCE WITH ALL LOCAL RULES AND REGULATIONS.TO REMOVAL. COORDINATE WITH OWNER TWO (2) WEEKS PRIOR TOWITH DIAMETER GREATER THAN 6".THE DRIPLINE SHALL BE MINIMIZED.TREE BARK OR BRANCHES.AS TREE PROTECTION FENCE PER MAPLEWOOD TREE STANDARDS (2017). SURVEY COMPLETED ON 5/12/2022. SURVEYORS ONLY RECORDED TREESOVER 6"; SMALLER TREES MAY BE PRESENT IN REMOVAL AREA. TREESNOT SPECIFICALLY SHOWN WERE NOT INCLUDED AS PART OF ORIGINALSURVEY. CONTRACTOR IS RESPONSIBLE FOR VERIFYING TREE LOCATIONSDISPOSAL IN ACCORDANCE WITH ALL STATE AND LOCAL REGULATIONS.CONTRACTOR MUST PROVIDE ASSURANCE THAT ASH TREES DO NOTLEAVE QUARANTINED AREA.CONSTRUCTION ACTIVITY. OWNER WILL APPROVE MARKED TREES PRIORCONSTRUCTION.IN ACCORDANCE WITH ALL LOCAL RULES AND REGULATIONS. ANY TREEREMOVED WITH DIAMETER AT BREAST HEIGHT GREATER THAN 6" SHALLHAVE STUMPS REMOVED.REMOVAL SHALL BE AVOIDED AND ANY GRADING OR COMPACTION WITHINOTHERWISE NOTED.SLASH MAY REMAIN WITHIN PROJECT LIMITS UNLESSREQUIRED BY FORESTER OR OWNER AT NO ADDITIONAL COST.STORE OR DRIVE HEAVY MATERIALS OVER TREE ROOTS. DO NOT DAMAGECLEAN AND UNSTAINED. ANY DAMAGE TO EXISTING FACILITIES SHALL BEREPAIRED AT THE CONTRACTOR'S EXPENSE. THE PROJECT SITE SHALL BEKEPT CLEAR OF CONSTRUCTION WASTES AND DEBRIS.NOTED ON THE SWPPP.OF TREES THAT WILL BE REMOVED. IF FEWER TREES ARE REMOVED THEQUANTITIES SHOWN MAY BE REDUCED WITH THE APPROVAL OF THE CITY.NOTED BELOW. REFER TO TREE REMOVAL SCHEDULE ON SHEET R-02 FORD.B.H., SPECIES, AND TYPE OF ALL TREES SURVEYED.- 1 2.REMOVE AND DISPOSE OF ALL WOOD AND DEBRIS IN REMOVAL AREA IN4.CONTRACTOR SHALL MARK ALL TREES FOR REMOVAL PRIOR TO ANY NOTES:1.EXISTING TREE LOCATIONS, SPECIES AND DIAMETER ARE BASED ON3.ASH TREES MUST BE REMOVED AND TAKEN TO AN APPROVED SITE FOR5.REMOVE TREE, GRIND STUMPS, AND DISPOSE OF ALL WOOD AND DEBRIS6.CONTRACTOR TO VERIFY AND RECORD QUANTITY OF TREES REMOVED7.IN AREAS TO BE CLEARED AND GRUBBED, ALL TREES NOT MARKED FOR8.CLEARING ALL TREES <6" DIAMETER WITHIN PROJECT LIMITS UNLESS9.THE CONTRACTOR SHALL AVOID DAMAGING EXISTING TREES. DO NOT10.THE CONTRACTOR SHALL KEEP PAVEMENTS, FIXTURES AND BUILDINGS11.CONTRACTOR IS TO FOLLOW ALL EROSION CONTROL REQUIREMENTS AS12.THE TREE REPLACEMENT SCHEDULE ANTICIPATES THE MAXIMUM NUMBER13.CLIENT INTENDS TO PAY FEE FOR MITIGATION OF TREES REMOVED AS14.PROVIDE SIGNAGE ON TREE PROTECTION FENCE OR SILT FENCE ACTING15.SEE R-05 FOR ADDITIONAL CONSTRUCTION SPECIFICATIONS (REQUIRED)16.SEE SHEET R-03 FOR RESTORATION PLAN : SEE SHEET R-03 FOR RESTORATION PLAN; 27 TREES PROPOSED. THE EXISTING Total Healthy Significant & Specimen Trees to be RemovedTree removal calculation: If less than 20 percent of the total significant or specimen tree diameter incheson the property is removed, the applicant shall replace one tree per significant and specimen treeTOTAL TREES FOR MITIGATION: 55 TREES Healthy Significant & Specimen TreesPercent Total of Healthy TreesMaplewood Tree Replacement Requirement (<20%)removed. Tree replacement shall be a minimum of two caliper inches in sizeNOTECONDITIONS ON SITE ARE NOT SUITABLE FOR THE INSTALLATION OF ADDITIONAL NEWLYPLANTED TREES. THE PROPERTY IS EITHER HEAVILY WOODED, WETLAND, OR PAVEDFOR PLANT OPERATIONS. AS A RESULT, XCEL WILL MITIGATE REMOVED TREES PER CITYOF MAPLEWOOD'S COMMUNITY DEVELOPMENT 2022 FEE SCHEDULE.TREE REPLACEMENT FEE REF: CITY OF MAPLEWOOD MUNICIPAL CODE FEE FOR TREE REPLACEMENT: $60/CALIPER INCHFEE FOR TREE MITIGATION: $60/CALIP. IN x (55 TREES X 2 IN)= $6,600 TREE PRESERVATION PLAN MITIGATION REQUIREMENTS REF: CITY OF MAPLEWOOD MUNICIPAL CODE CONSTRUCTION LIMITS(LIMITS OF DISTURBANCE)AND TREE REMOVAL SUMMARYAREA, NO GRADING OR SOILWETLAND BUFFER SIGN TO BEAPART, ADJUST IN FIELD ASWETLAND BUFFER, SEE CIVIL EXISTING 10' CONTOUREXISTING 2' CONTOUREXISTING PROPERTY LINEEXISTING OVERHEAD ELECTRICEXISTING EASEMENTEXISTING GAS LINEEXISTING FENCETREE PROTECTION FENCEEXISTING TREE, PROTECTTREE IN PLACEREMOVE TREE - TREEIDENTIFICATION NUMBER, SEETABLE BELOW FOR TREE SURVEYGRADING EXTENTS, SEE CIVILDRAWINGS FOR GRADING ANDSITE LAYOUT PLANINVASIVE SPECIES REMOVALDISTURBANCE WITHINLOCATED APPROXIMATELY 150'NECESSARYSHEET 4300 FOR LOCATINGEXTENTS OF BUFFER TREE PRESERVATION PLAN X XXXXXX OE 996994 GAS SYMBOL AND PATTERN LEGEND MAPLEWOOD PHASE II FIRE SUPPRESSION NORTH 75-FOOT AVERAGE WETLANDBUFFER BOUNDARY, SEE CIVILSHEET 4300 FOR LOCATION ANDDIMENSIONS 09/07/2022 PROPERTY LINE (TYP.) BHD WETLAND BUFFERSIGNS SHALL BESEE, INSTALLED EVERY150' AROUNDBUFFER BOUNDARY. WETLAND 2 BOUNDARY CONSTRUCTIONLIMITS, TYP. CIVIL SHEET 4300 FOR LOCATION AND DIMENSIONS.BOUNDARY SHALL BE STAKED PRIOR TO CONSTRUCTIONAND MAINTAINED UNTIL ALL CONSTRUCTION ANDPLANTING ACTIVITIES ARE COMPLETE. 100- FOOT AVERAGE WETLAND BUFFER BOUNDARY, SEE REVISIONS TREESEE PROTECTIONFENCE, TYP., ISSUED FOR REVIEW SEE CIVIL SHEETS FORGRADING AND SITE LIMITS OF DISTURBANCE,LAYOUT A 09/07/2022 09/07/202209/07/202209/07/2022 BARR BHD BHD AMW WETLAND 1 BOUNDARY (INCIDENTAL) G G G G TREE FORREMOVAL, TYP.;SEE TREEPRESERVATIONSCHEDULE TANKS AND EXISTING GASLINES TOREMAIN ANDPROTECT, TYP. G HISTORYDATE G G G GG G G G SEE CIVIL SHEETS FORGRADING AND SITE LIMITS OF DISTURBANCE,LAYOUT G G G E G G O CONSTRUCTIONLIMITS, TYP. G G G G G 4300 MARKETPOINTE DRIVE Suite 200MINNEAPOLIS, MN 55435 Ph: 1-800-632-2277Fax: (952) 832-2601www.barr.com G G G G G G G TREE PROTECTIONFENCE, TYP.,SEE G G G G . G LICENSE # G . STATE OF MINNESOTA. WETLAND 3BOUNDARY HERBICIDE AND REMOVE ALL INVASIVEBUCKTHORN, HONEYSUCKLE, GARLIC MUSTARD,AND ALL NOXIOUS WEEDS FROM THE REMAININGMANAGE A WETLAND BUFFER WITHIN THE XCELENERGY PROPERTY. WOODY INVASIVE SPECIESARE TO BE CUT NO MORE THAN 3" HIGH. CUTSTUMPS ARE TO BE TREATED WITH HERBICIDE (PERMANUFACTURES RECOMMENDATIONS) AND ROOTSARE TO REMAIN IN PLACE TO PREVENT EROSION. G . G SUPERVISION AND THAT I AM A DULY LICENSED PROFESSIONAL ENGINEER UNDER THE LAWS OF THE REPORT WAS PREPARED BY ME OR UNDER MY DIRECT I HEREBY CERTIFY THAT THIS PLAN, SPECIFICATION, OR PRINTED NAMESIGNATUREDATE G WETLAND BUFFER SIGNS SHALL BEAREAS WITHIN BUFFER SEE, INSTALLED EVERY 150' AROUNDBUFFER BOUNDARY. ADJUSTLOCATIONS IN FIELD BETWEENEXISTING FACILITY AND NATURAL NOT TO SCALE DETAIL: WETLAND BUFFER SIGN OT DATE: 9/8/2022 4:27 PMCADD USER: Brendan H. Dougherty FILE: M:\\DESIGN\\23621438.00\\MAPLEWOOD\\23621437_R-01_TREE PROTECTION PLAN.DWG PLOT SCALE: 1:2 PL QTYQTY A R-03 CONTAINERCONTAINER N SIZESIZE 120 60 COMMON NAMECOMMON NAME SCALE IN FEET 4501038238 0 PLAN: RESTORATION PLAN - 1 WRITING BY THE LANDSCAPE ARCHITECT. THE LANDSCAPE ARCHITECT RESERVES THESPRAYED WITH HERBICIDE 14 DAYS PRIOR TO SEEDING OR AS PER MANUFACTURE'SSITE.STATE OF MINNESOTA.AND COMPACTION.THE EXTENDED LANDSCAPE MAINTENANCE SPECIFICATIONS.OF PLANTINGS IS COMPLETE, INSPECTION HAS BEEN MADE AND PLANTING IS ACCEPTEDTHE CITY REQUIRING THAT THE APPLICANT ESTABLISH AND MAINTAIN THE REQUIRED RIGHT TO REJECT ANY PLANTS WHICH ARE DEEMED UNSATISFACTORY.STOCK", ANSI-Z60. LATEST EDITION, OF THE AMERICAN ASSOCIATION OF NURSERYMEN, INC.SOME FIELD ADJUSTMENT MAY BE NECESSARY. LANDSCAPE ARCHITECT TO REVIEW PLANTLAYOUT PRIOR TO PLANTING. INFORM THE LANDSCAPE ARCHITECT OF PLANTING TWO DAYSPRIOR TO PLANT DELIVERY.RECOMMENDATION. SIGNAGE INDICATING THE USE OF HERBICIDES MUST BE POSTED ONIMMEDIATELY FOLLOWING FINAL GRADING AND TOPSOIL PLACEMENT TO PREVENT EROSIONSEEDING AREA IN ACCORDANCE WITH MN/DOT STANDARD SPECIFICATION 3882.DISCREPANCIES BETWEEN THIS DETAIL, PLANS, OR SPECIFICATIONS, THE SPECIFICATIONSSHALL GOVERN.PLACE. PLANT MATERIAL SHALL BE PROTECTED AND MAINTAINED UNTIL THE INSTALLATIONEXCLUSIVE OF THE GUARANTEE. SEE ADDITIONAL SPECIFICATION NOTES ON R-04.MITIGATION WITHIN THE BUFFER FOR A THREE-YEAR PERIOD.MATERIAL PRIOR TO GROWING SEASON, RE-SETTING PLANTS AND PROPER GRADE, ANDKEEPING PLANTS IN A PLUMB POSITION. AFTER ACCEPTANCE, THE OWNER SHALL ASSUMEMAINTENANCE RESPONSIBILITIES. HOWEVER, THE CONTRACTOR SHALL CONTINUE TO BERESPONSIBLE FOR KEEPING THE TREES PLUMB THROUGHOUT THE GUARANTEE PERIOD.PLANTS ONCE A WEEK. IN EXTREMELY HOT, DRY WEATHER, WATER MORE OFTEN ASREQUIRED BY INDICATIONS OF HEAT STRESS SUCH AS WILTING LEAVES. CHECK MOISTUREUNDER MULCH PRIOR TO WATERING TO DETERMINE NEED. CONTRACTOR SHALL MAKE THENECESSARY ARRANGEMENTS FOR WATER. PLANT SCHEDULE TREESAMELANCHIER ARBOREADOWNY SERVICEBERRY2" CAL.B&B5AMELANCHIER LAEVISALLEGHENY SERVICEBERRY2" CAL.B&B6CERCIS CANADENSIS `NORTHERN STRAIN`NORTHERN STRAIN REDBUD2" CAL.B&B6CRATAEGUS CRUS-GALLICOCKSPUR HAWTHORN2" CAL.B&B4CRATAEGUS MOLLISDOWN HAWTHORN2" CAL.B&B3SHRUBSCORNUS RUGOSAROUND-LEAVED DOGWOOD#3CONT.16CORNUS SERICEARED TWIG DOGWOOD#3CONT.14 PRUNUS AMERICANAAMERICAN PLUM2" CAL.CONT.3DIERVILLA LONICERADWARF BUSH HONEYSUCKLE#3CONT.40 GENERAL NOTES 1.SEE R-05 FOR ADDITIONAL SPECIFICATIONS AND PLANTING NOTES PLANT MATERIAL2.ALL PLANTING STOCK SHALL CONFORM TO THE "AMERICAN STANDARD FOR NURSERY2.ALL HERBICIDE APPLICATION SHALL BE APPLIED BY A LICENSED APPLICATOR WITHIN THE4.COVER CROP IS TO BE SEEDED WITHIN ALL AREAS.6.REFER TO SPECIFICATIONS FOR ADDITIONAL INFORMATION. IN THE CASE OF ANY2.OWNER TO SIGN A WETLAND BUFFER MITIGATION AND MAINTENANCE AGREEMENT WITH4.WATERING: MAINTAIN A WATERING SCHEDULE WHICH WILL THOROUGHLY WATER ALL 1.NO SUBSTITUTIONS OF PLANT MATERIAL SHALL BE ACCEPTED UNLESS APPROVED IN3.STAKE ALL PROPOSED PLANT BEDS AS SHOWN ON PLAN, DETAILS, AND PLANT SCHEDULE.SEEDING1.ANY EXOTIC INVASIVE PLANTS AND WEEDS WITHIN THE SEEDING AREAS SHALL BE3.SEED IN ACCORDANCE WITH THE SPECIFICATIONS. SEEDING IS TO TAKE PLACE5.AFTER SEEDING, TYPE 8 MULCH MATERIAL SHALL BE DISC-ANCHORED OVER ENTIRE7.ALL AREAS WITHIN THE CONSTRUCTION LIMITS SHALL BE MANAGED AND MAINTAINED PERMAINTENANCE AND CARE1.MAINTENANCE SHALL BEGIN IMMEDIATELY AFTER EACH PORTION OF THE WORK IS IN3.MAINTENANCE SHALL INCLUDE WATERING, WEEDING, MULCHING, REMOVAL OF DEAD RESTORATION PLAN WETLAND BUFFER, SEE CIVIL TREE IN PLACE, SEE R-01WETLAND BUFFER SIGN, SEESHEET 4300 FOR LOCATINGEXTENTS OF BUFFER EXISTING 10' CONTOUREXISTING 2' CONTOUREXISTING PROPERTY LINEEXISTING EASEMENTEXISTING FENCECONSTRUCTION LIMITSNEW FENCE LINEEXISTING TREE, PROTECTNATIVE SEEDING AND PLUGPLANTING AREA, SEE SHEETR-04 FOR SEED SCHEDULESHEET R-01. MAPLEWOOD PHASE II FIRE SUPPRESSION PROPERTY LINE (TYP.) X XXX 996994 NORTH SYMBOL AND PATTERN LEGEND AND DIMENSIONS. BOUNDARY SHALL BE STAKEDALL CONSTRUCTION AND PLANTING ACTIVITIESARE COMPLETE. WETLAND BUFFERBOUNDARY, SEE CIVIL SHEET 4300 FOR LOCATIONPRIOR TO CONSTRUCTION AND MAINTAINED UNTIL 09/07/2022 BHD WETLAND 2BOUNDARY (3)ROUND-LEAVED DOGWOOD (5)DWARF BUSH HONEYSUCKLE (3)ROUND-LEAVED DOGWOOD (5)DWARF BUSH HONEYSUCKLE (5)DWARF BUSH HONEYSUCKLE (3)RED TWIG DOGWOOD (3)RED TWIG DOGWOOD WETLAND BUFFERAND DIMENSIONS. BOUNDARY SHALL BE STAKEDALL CONSTRUCTION AND PLANTING ACTIVITIESARE COMPLETE. BOUNDARY, SEE CIVIL SHEET 4300 FOR LOCATIONPRIOR TO CONSTRUCTION AND MAINTAINED UNTIL REVISIONS (3)DOWNY HAWTHORN ISSUED FOR REVIEW LIMITS OF DISTURBANCE,SEE CIVIL SHEETS FORGRADING AND SITELAYOUT (5)DOWNY SERVICEBERRY A (3)ALLEGHENY SERVICEBERRY(3)NORTHERN STRAIN REDBUD(1)COCKSPUR HAWTHORN (5)LOW BUSH HONEYSUCKLE (5)LOW BUSH HONEYSUCKLE (3)NORTHERN STRAIN REDBUD (5)ROUND-LEAVED DOGWOOD (3)ALLEGHENY SERVICEBERRY 09/07/2022 09/07/202209/07/202209/07/2022 (5)RED TWIG DOGWOOD NATIVE SEEDING AND PLUGSPLANTED IN GROUPINGS 24"O.C. THROUGHOUT ALLDISTURBED AREAS, TYP.,SEE (5)DWARF BUSH HONEYSUCKLE BARR BHD BHD AMW WETLAND 1 BOUNDARY (INCIDENTAL) TANKS AND EXISTING GASLINES TOREMAIN ANDPROTECT, TYP. HISTORYDATE CONSTRUCTION LIMITS, TYP. DETENTION POND WITHIMPERVIOUS SURFACE,SEE CIVIL SHEET 4300 (3)AMERICAN PLUM (5)DWARF BUSH HONEYSUCKLE (3)COCKSPUR HAWTHORN (5)ROUND-LEAVED DOGWOOD (3)RED TWIG DOGWOOD E (5)DWARF BUSH HONEYSUCKLE O 4300 MARKETPOINTE DRIVEPh: 1-800-632-2277Fax: (952) 832-2601www.barr.com Suite 200MINNEAPOLIS, MN 55435 . LICENSE # WETLAND 3 BOUNDARY THROUGHOUT, TYP., SEE NATIVE SEEDING ANDPLUGS PLANTED INGROUPS 24" O.C. . STATE OF MINNESOTA. . SUPERVISION AND THAT I AM A DULY LICENSED PROFESSIONAL ENGINEER UNDER THE LAWS OF THE REPORT WAS PREPARED BY ME OR UNDER MY DIRECT I HEREBY CERTIFY THAT THIS PLAN, SPECIFICATION, OR PRINTED NAMESIGNATUREDATE OT DATE: 9/8/2022 4:29 PMCADD USER: Brendan H. Dougherty FILE: M:\\DESIGN\\23621438.00\\MAPLEWOOD\\23621437_R-01_TREE PROTECTION PLAN.DWG PLOT SCALE: 1:2 PL A R-04 AFFIX TO TO HOLES IN T-POSTS WITH 10 GAUGEWIRE.YEARS OF MAINTAINED PLUMB POSITION. MAINTAIN VERTICALITY FOLLOWING PLANTING.TREE STAKING SHALL BE CONSIDEREDTRUNK.POLYETHYLENE STRAPS AROUND TRUNK AND INCIDENTAL TO TREE PLANTING.INTO THE GROUND ON EITHER SIDE OF THE AT LEAST 2 FEET INTO THE (2) STEEL T-POSTSSTAKES MUST BE ANCHOREDGROUND. TREE STAKING NOTES:2.INSTALL TWO (2) 8' STEEL T-POSTS, ANCHORED 2'3.INSTALL 16" LONG 40 MIL POLYPROPYLENE OR4.REMOVE THE TREE STAKING AFTER TWO (2) 1.ALL TREES SHALL BE STAKED AND TIED TO 4501038238 DETAIL: TREE STAKING NOT TO SCALE - 3 POLYPROPYLENE OR POLYETHYLENE STRAPS MAPLEWOOD PHASE II FIRE SUPPRESSION TREE PRESERVATION AND RESTORATION DETAILS NORTH 4.402.383.183.682.204.403.400.880.306.100.141.200.290.300.463.201.600.900.060.061.801.303.202.001.700.50 (PLS)24.8224.8011.1411.1460.75 SEEDS/SQ.FT. ANIMAL BROWSING. TREE PROTECTION SHALLAROUND ROOT MASS TO MAINTAIN PLUMB ANDWATER WITHIN 3 HOURS OF INSTALLATION.AND TO A DEPTH OF 3" AROUND TREE (SOILADDITIONAL DETAIL. GALVANIZED DEER FENCING TO PROTECT FROMBE CONSIDERED INCIDENTAL TO TREEPLANTINGRETAIN THE NATURAL FORM OF PLANT. DO NOTCUT THE LEADERCONTAINER EXCAVATE SURFACE SOIL TO BASEOF ROOT FLARE.MASS, ALL SIDES.TO PLANTINGSO ROOT FLARE IS EVEN WITH FINISH GRADE.ENSURE NO AIR GAPS AROUND ROOT MASS.SPEC 3882.2 TYPE 6 - WEED SEED FREESHREDDED HARDWOOD.) TO A RADIUS OF 24"PREPARED AS PER PLAN).PLANT.MAINTAINING TREES IN A PLUMB POSITIONTHROUGHOUT THE GUARANTEE PERIOD.THROUGHOUT GUARANTEE PERIOD (1-YEAR) TOMAINTAIN IN A HEALTHY CONDITION. AT THEEND OF THE GUARANTEE PERIOD ALL TREESTHAT ARE DEAD OR DETERMINED UNHEALTHYOR UNSIGHTLY SHALL BE REPLACED ATCONTRACTOR'S EXPENSE. SEE HERBACEOUSPLANT ESTABLISHMENT SPECIFICATIONS FOR TREE PLANTING NOTES:2.ALL DECIDUOUS TREES SHALL BE ENCLOSED BY3.REMOVE DEAD OR DAMAGED BRANCHES.4.IF ROOT FLARE IS NOT EXPOSED WITHIN THE5.DIG PLANT HOLES 6" MIN. LARGER THAN ROOT6.SCARIFY BOTTOM AND SIDES OF HOLE PRIOR7.SET TREE ON LIGHTLY FIRMED BACKFILL SOIL8.BACKFILL WITH PLANTING SOIL AND FIRM SOIL9.CONSTRUCT 3" WATERING BASIN. THOROUGHLY 1.PROVIDE AND INSTALL PLANTS PER SCHEDULE.10.PLACE SHREDDED HARDWOOD MULCH (MN/DOT11.NO MULCH TO BE IN CONTACT WITH BASE OF12.CONTRACTOR IS RESPONSIBLE FOR13.CONTRACTOR TO WATER AS NECESSARY 4.34%3.61%3.64%2.90%2.89%2.89%1.79%0.91%0.17%0.52%0.52%0.50%0.42%0.38%0.33%0.28%0.18%0.17%0.17%0.17%0.18%0.19%0.14%0.09%0.09%0.05%4.38% 23.14%72.48%72.48% 100.00% % OF MIX (BY WEIGHT) 09/07/2022 1.681.401.401.121.121.120.690.360.078.970.200.200.190.160.150.120.110.070.070.070.070.070.070.060.030.030.021.68 28.0228.0238.67 RATE AMW (KG/HA) 6" OPENINGS AT BOTTOM, 4" X6" AT TOP)TREE PER SCHEDULEAND NOT COVERED WITH MULCHADVANTAGEOUS AND FIBROUS 5' TALL GRADUATEDGALVANIZED DEER FENCE (1"X(3) STEEL T-POSTS(3) NON-PHOTODEGRADABLENYLON CABLEROOT FLARE, TO BE AT GRADEOR SOULPRUNE AND REMOVEROOTS ABOVE ROOT FLARE3" SHREDDEDHARDWOOD MULCH(INCIDENTAL TO TREEINSTALLATION)BACKFILL SOIL EXISTING SUBGRADE 0.11 1.501.251.251.001.001.000.620.320.060.180.180.170.140.130.100.060.060.060.060.060.060.050.030.030.021.50 25.0025.00 RATE (LBS/AC) Total34.50 NATIVE SEED MIX: MN/DOT 36-211 REVISIONS Forbs Subtotal Grasses Subtotal8.00 Cover Crop Subtotal SCIENTIFIC NAME Bromus kalmiiElymus canadensisElymus trachycaulusAndropogon gerardiiBouteloua curtipendulaSorghastrum nutansSchizachyrium scopariumElymus hystrixPanicum virgatumRudbeckia hirtaDalea candidaDesmodium canadenseHeliopsis helianthoidesZizia aureaAgastache foeniculumMonarda fistulosaRosa blandaSolidago speciosaSymphyotrichum laeveScrophularia lanceolataAchillea millefoliumAgeratina altissimaSolidago flexicaulisAvena sativa Vicia americanaOligoneuron rigidumOsmorhiza claytonii ISSUED FOR REVIEW NOT TO SCALE DETAIL: TREE PLANTING A - 2 TYP. 24" MIN. COMMON NAME 09/07/2022 09/07/202209/07/202209/07/2022 Wild bergamotWhite snakeroot 36-211 Woodland Edge South & WestKalm's bromeNodding wild ryeSlender wheatgrassBig bluestemSide-oats gramaIndian grassLittle bluestemBottlebrush grassSwitchgrassBlack-eyed SusanAmerican vetchWhite prairie cloverCanada tick trefoilEarly sunflowerGolden AlexandersBlue giant hyssopStiff goldenrodClayton's sweet CicelySmooth wild roseShowy goldenrodSmooth asterLance-leaved figwortCommon yarrowZigzag goldenrodOats BARR BHD BHD AMW HISTORYDATE FENCINGGAP ATBOTTOMOF FENCE,6" TYP. T-POSTS STEEL AS SHOWN. ENSURE CABLE TIES AREANIMAL ENTRAPMENT IN FENCED AREA.WEATHER COLD TEMPERATURE UVSTABILIZED TIES.TIE ATTACHMENT.TO MAINTAIN OR REPLACE AS NECESSARYTHROUGHOUT THE TERM OF THE PROJECT. BETWEEN POSTS AND ANCHOR SECURELYPULLED TAUGHT AGAINST POST TOPREVENT SLIPPING.FENCE AS SHOWN TO PREVENT SMALL DRIP LINE OF TREE 2.PROVIDE 6" TYP. SPACE AT BOTTOM OF3.ENSURE CABLE TIES ARE EXTREME4.T-POSTS SHALL BE STUDDED FOR CABLE5.INSPECT FENCE REGULARLY AND REPAIR NOTES:1.ENSURE FENCE IS PULLED TAUGHT 1' MIN. SIDE VIEW 4300 MARKETPOINTE DRIVEPh: 1-800-632-2277Fax: (952) 832-2601www.barr.com Suite 200MINNEAPOLIS, MN 55435 . SUPPORTWIRE ORCABLE BRAIDED LICENSE # EARTH SUBGRADE UNDISTURBED SURFACE SOIL TO BASE OF ROOT FLARE.WITH FINISH GRADE.OF INSTALLATION.WEED SEED FREE SHREDDED HARDWOOD.) TO A RADIUS OF 24" AND TO ATHE GUARANTEE PERIOD ALL SHRUBS THAT ARE DEAD OR DETERMINEDADDITIONA L DETAIL. PLANT.MAINTAIN PLUMB AND ENSURE NO AIR GAPS AROUND ROOT MASS.DEPTH OF 3" AROUND PLANT.PERIOD (1-YEAR) TO MAINTAIN IN A HEALTHY CONDITION. AT THE END OFUNHEALTHY OR UNSIGHTLY SHALL BE REPLACED AT CONTRACTOR'SEXPENSE. SEE HERBACEOUS PLANT ESTABLISHMENT SPECIFICATIONS FOR ANCHOR . STATE OF MINNESOTA. SHRUB AND VINE PLANTING NOTES:2.REMOVE DEAD OR DAMAGED BRANCHES. RETAIN THE NATURAL FORM OF3.IF ROOT FLARE IS NOT EXPOSED WITHIN THE CONTAINER EXCAVATE4.DIG PLANT HOLES 6" MIN. LARGER THAN ROOT MASS, ALL SIDES.5.SET SHRUB ON LIGHTLY FIRMED BACKFILL SOIL SO ROOT FLARE IS EVEN6.BACKFILL WITH PLANTING SOIL FIRM SOIL AROUND ROOT MASS TO7.CONSTRUCT 3" WATERING BASIN. THOROUGHLY WATER WITHIN 3 HOURS8.PLACE SHREDDED HARDWOOD MULCH (MN/DOT SPEC 3882.2 TYPE 6 -9.NO MULCH TO BE IN CONTACT WITH PLANT. 1.PROVIDE AND INSTALL PLANTS PER SCHEDULE.10.CONTRACTOR TO WATER AS NECESSARY THROUGHOUT GUARANTEE . SUPERVISION AND THAT I AM A DULY LICENSED PROFESSIONAL ENGINEER UNDER THE LAWS OF THE REPORT WAS PREPARED BY ME OR UNDER MY DIRECT I HEREBY CERTIFY THAT THIS PLAN, SPECIFICATION, OR PRINTED NAMESIGNATUREDATE SOILSUBGRADE BACKFILLEXISTING 6'L STEEL T-POSTS, EVENLYSPACEDG-04, G-05 NON-PHOTODEGRADABLENYLON CABLE TIES, MIN. 5 TIESPER POST 48"H HD ORANGE PLASTIC SNOW FENCE W/ 4-1/8" x 7/8" MESH TOO DEEP OR TOO SHALLOW. FIRM SOIL TO ENSURE GOOD CONTACT WITH ROOTS. MAINTAIN IN A HEALTHY CONDITION. AT THE END OF THE GUARANTEE PERIOD(1-YEAR)ALL PLANTS THAT ARE DEAD OR DETERMINED UNHEALTHY OR UNSIGHTLYSHALL BE REPLACED AT CONTRACTOR'S EXPENSE. SEE HERBACEOUS PLANTESTABLISHMENT SPECIFICATIONS FOR ADDITIONAL DETAIL. 8' TYP. HERBACEOUS PLUG PLANTING NOTES:2.EXCAVATE HOLE 3 TIMES WIDTH OF ROOTBALL.3.BREAK BOTTOM OF ROOTBALL TO LOOSEN ROOTS.4.PLANT THROUGH MULCH ALIGNING ROOTBALL TOP EVEN WITH SOIL - DO NOT PLANT5.SCARIFY BOTTOM OF HOLE PRIOR TO PLANTING.6.WATER THOROUGHLY AFTER PLANTING.7.CONTRACTOR TO WATER AS NECESSARY THROUGHOUT GUARANTEE PERIOD TO 1.PROVIDE AND INSTALL PLANTS PER SCHEDULE. 3" DOUBLE SHREDDEDHARDWOOD MULCH COMPLETELY ENCLOSE DETAIL: TREE PROTECTION FENCE NOT TO SCALE AS SHOWN, SEE SHEETS TREES FOR PROTECTION GRADE FINISH SUBGRADE TYP. 6" NOT TO SCALE TYP. NOT TO SCALE DETAIL: HERBACEOUS PLUG 24" MIN. -- 5DETAIL: SHRUB PLANTING - 4 FRONT VIEW 54"18" MIN. 8/2022 4:16 PMBrendan H. Dougherty FILE: M:\\DESIGN\\23621438.00\\MAPLEWOOD\\23621437_R-01_TREE PROTECTION PLAN.DWG PLOT SCALE: 1:2 PLOT DATE: 9/CADD USER: Engineering Plan Review PROJECT:Xcel Energy Propane Plant Upgrades 1555 Century Avenue North PROJECT NO: 22-22 COMMENTS BY: Jon Jarosch, P.E. – Assistant CityEngineer DATE: 8-8-2022 PLAN SET: Engineering plans dated 6-22-2022 REPORTS:Drainage Report dated 7-20-2022 The applicant is seeking city approval of upgrades to the propane plant at 1555 Century Avenue North. The applicant is requesting a reviewof the current designas part of a request for a conditional use permit, wetland buffer variance, and the vacation of an existing easement. Theamount of disturbance on this site is greater than ½acre. As such,the applicantis required to meet the City’s stormwater quality, rate control, and other stormwater management requirements.The applicant is proposing to meet these requirements via the use of detention basins, fore bays, and automated overflow systems. This review does not constitute a final review of the plans, as the applicant will need to submit construction documents, agreements, and calculationsfor final review.Thefollowing are engineeringreview comments on the design and act as conditions prior to issuing permits. Drainage and Stormwater Management 1)The project shall be submitted to the Ramsey-Washington Metro Watershed District (RWMWD) for review. All conditions of RWMWD shall be met. 2)A joint storm water maintenance agreement shall be prepared and signed by the owner for the proposed basins, pretreatment devices,and associated piping and structures. The Owner shall submit a signedcopy of the joint storm-water maintenance agreement with the RWMWDto the City. 3)Basins shall include pre-treatment devices to remove sediment from runoff. 4)The drainage calculations utilize a water-quality volume of 1-inch over the impervious surface on the site. The City of Maplewood requires a water-quality volume of 1.1-inches of runoff over the site impervious surfaces. The drainage calculations and water-quality infrastructure (if necessary) shall be adjusted accordingly. 5)Emergency overflows shall be identified on the plans for the detention basins. 6)The site proposes to utilize detention basins to meet the City’s runoff rate and water- quality requirements. These detention basinsshall meet the requirements for ponds/basins in the City’s stormwater management standards. 7)Calculations are required showing that the detention basins are removing a minimum of 90% total suspended solids and 60% total phosphorus. Easement Vacation The easement being requested for vacationappears to have been taken for a road extension for development in the late 1970’s. This road extension never occurred and the development occurred with a different layout that didn’t utilize this easement area for roadway purposes. The easement area does not contain any public utilities. The Engineering Department has no concerns with the proposed easement vacation, which should follow the proper vacation procedures should the vacation request beapproved. Grading and Erosion Control 8)All slopesshall be 3H:1V or flatter. 9)Inlet protection devices shall be installed on all existing and proposedonsite storm seweruntil all exposed soils onsite are stabilized.This includes storm sewer on adjacent streets that could potentially receive construction related sedimentor debris. 10)Adjacent streetsand parking areasshall be swept as needed to keep the pavement clear of sediment and construction debris. 11)The total grading volume (cut/fill) shallbe noted on the plans. 12)A copy of the project SWPPP and NDPES Permit shall be submitted prior to the issuance of a grading permit. Sanitary Sewer and Water Service 13)The applicant shall be responsible for paying any SAC, WAC, or PAC charges related to the improvements proposed with this project.A SAC determination is required. 14)Allmodifications to the water system shall be reviewed by Saint Paul regional Water Services. All requirements of SPRWS shall be met. 15)All new sanitary sewer service piping shall be schedule 40 PVC or SDR35. Other 16)The proposed water service line to this site lies within MnDot right-of-way along Century Avenue/Trunk Highway 120. The applicant shall submit the project to MnDot for review and approval. Documentation showing MnDot approval is required prior to the issuance of City of Maplewood permits. 17)A Ramsey County right-of-way permit may be required for the water service connection at Larpenteur Avenue. Documentation showing Ramsey County approval is required prior to the issuance of City of Maplewood permits. Public Works Permits The following permits are required by the Maplewood Public Works Department for this project. The applicant should verify the need for other City permits with the Building Department. 18)Grading and erosion control permit 19)Storm Sewer Permit -END COMMENTS - Environmental Review Project: Xcel Energy Gas Plant Date of Plans:Revised Phase II Fire Suppression Tree Preservation Plandated September 9, 2022. Date of Review:September 15, 2022 Location:1555 Century Avenue Reviewer: Shann Finwall, Environmental Planner 651-249-2304, shann.finwall@maplewoodmn.gov Project Background:Xcel Energy is proposing to make safety upgrades and plant improvements to their existing gas plant at 1555 Century Avenue. There are significanttrees and a Manage A and B wetland located on the site. The development must comply with the City’s tree and wetland ordinances, and landscape and wildlife impact policies. Trees 1.Tree Preservation Ordinance: a.Significant Trees: Maplewood’s treepreservation ordinance describes a significant tree asa healthy tree of the following size: hardwood tree with a minimum of 6 inches in diameter, an evergreen tree with a minimum of 8 inches in diameter, and a softwood tree with a minimum of 12 inches in diameter. b.Specimen Trees: A specimen tree is defined as a healthy tree of any species that is 28 inches in diameter or greater. c. Tree Replacement: If greater than 20 percent of significant trees are removed, tree replacement is based on a calculation of significant trees located on the site and significant trees removed. Credits are given for all specimen trees that are preserved.If less than 20 percent of significant trees are removed, tree replacement is based on a calculation of one 2-caliper inch replacement tree per significant tree removed. d.Exemptions: Tree removal related to public improvement projects to “existing” utility work or repair. However, in this case the existing Xcel Energy utility is expanding with new systems andequipment and does not fall within the tree removal exemptions for existing utilities. e.Tree Replacement: The tree standards require that as many replacement trees be planted on the site as possible. An applicant can pay into the City’s tree fund at a rate of $60 per caliper inch for trees that cannot be planted on site. The City uses the tree fund to manage trees in parks and within the right-of-way. 2.Tree Impacts:There are 542 significant trees equaling 8,165 caliper inches on the site. The applicants propose to remove 82 significant trees equaling 1,356caliper inches (17 percent tree removal). Since less than 20 percent of the overall trees will be removed, the City’s tree ordinance requires that the applicant replace one 2-caliper inch tree for each tree removed. In this case, the applicant must replace 82 trees, for a total of 164 caliper inches. 3.Tree Replacement:The landscape plan shows 27 treesnew trees, totaling 54 caliper inches of replacement trees. 4.Tree Recommendations: a.Prior to issuance of a grading permit, the applicant must submit the following: 1)Tree protection plan. The current plan shows tree protective fencing. However, there are areas of the fencing that don’t seem to protect the trees as outlined in the City of Maplewood’s Tree Standards. In summary, tree protective areas shall be located at a minimum of the critical root zone of trees or drip line, whichever is greater. 2)Aplan for how the downed trees will be repurposed or recycled. 3)Tree escrow in the amount of $60 per caliper inch of trees to be replaced on the site. The escrow will be released once the trees are planted with a one-year warranty. 4) Tree fund payment in the amount of $60 per caliper inch of replacement tree that cannot be planted on site. Since 54 caliper inches of trees are proposed to be planted on the site, the applicants would owe the City’s tree fund $6,600 (164 caliper inches of required tree replacement – 54 caliper inches of trees planted on the site = 110 caliper inches of trees not planted on the site x $60 = $6,600). Wetlands 1.Wetland Ordinance: a.Buffer Minimums: The City’swetland ordinance requires a 50-foot minimum and 75-foot average wetlandbufferbe maintained around a Manage B wetland and a 75-foot minimum and 100-foot average wetland buffer be maintained around a Manage A wetland. No mowing, grading, or building is allowed within the buffer. b.Public Utilities: The City Council may waive the requirements of the wetland ordinance for the construction or maintenance of public utilities through buffers where it determines that there is a greater public need for the project than to meet the requirement of the wetland buffer ordinance. In waiving the requirements the City Council shall apply the following standards: 1)The city may only allow the construction of public utilities through buffers where there is no other practical alternative. 2)Before the City Council acts on the waiver, the Environmental and Natural Resources Commission and the Planning Commission shall make a recommendation to the City Council. The city shall hold a public hearing for the waiver. The city shall notify the property owners within 500 feet of the property for which the waiver is being requested at least ten days before the hearing. 3)Utility corridors shall not be allowed near endangered or threatened species. 4)Utility corridors, including any allowed maintenance roads, shall be as far from the wetland as possible. 5)Utility corridor construction and maintenance shall protect the wetland and buffer and avoid large trees as much as possible. 6)The city shall not allow the use of pesticides or other hazardous or toxic substances in buffers or wetlands; however, in some situations the use of herbicides may be used if prior approval is obtained from the administrator. 7)The owner or contractor shall replant utility corridors with appropriate native vegetation, except trees, at preconstruction densities or greater after construction ends. Trees shall be replaced as required by city ordinance. 8)Any additional corridor access for maintenance shall be provided as much as possible at specific points rather than to the road which is parallel to the wetland edge. If parallel roads are necessary they shall be no greater than 15 feet wide. 9)The City Council, upon recommendation of the administrator, may require additional mitigation actions as a condition of granting the waiver. 2.Required Wetland Buffers: Ramsey-Washington Metro Watershed District has reviewed and approved the wetland delineation. Wetland 1 is identified as incidental (manmade wetland with no wetland buffer requirements), Wetland 2 is identified as a Manage B wetland (50-foot minimum, 75-foot average wetland buffer), and Wetland 3 is identified as a Manage A wetland (75-foot minimum, 100-foot average wetland buffer). The incidental wetland will be removed from the City’s wetland map, and no wetland regulations will apply. 3.Wetland Buffer Impacts: The applicants are requesting a waiver from the wetland buffer requirements for the expansion of the existing utility due to site constraints and new code requirements.The expansion will require the filling of the incidental wetland (Wetland 1) and grading to within approximately 20 to 30 feet of the Manage A wetland (Wetland 3). There is an existing gravel access drive that encroaches to within approximately 50 feet of the Manage B wetland (Wetland 2). Grading and construction of the detention pond will expand into this area. Since it was a pre-existing encroachment, no additional wetland buffer impacts will take place near the Manage B wetland. The proposal requires a 70to 80-foot wetland buffer waiver for encroachments to the Manage A wetland. 4. Wetland Buffer Recommendations: a)Prior to issuance of a grading permit the applicant shall: 1)Submit a detailed grading plan showing the wetland edges, required wetland buffers, and dimensions of all wetland buffer encroachments. The grading plan submitted shows the existing wetland edges and the proposed encroachments, but no dimensions are shown.If additional encroachmentsare shown other than outlined in this report, the applicants must resubmit a wetland buffer mitigation plan for those areas of encroachment. 2)Submit a detailed planting plan for the bottom and sides of the detention pond. 3)Submit a wetland buffer signplan showing that wetland buffer signs installed along the approved wetland buffer for the Manage A and Manage B wetland every 100 feet at a minimum. 4) Install wetland buffer signsprior to grading. 5)Sign a wetland buffer mitigation and maintenance agreement with the City requiring that the applicant establish and maintain the required mitigation within the buffer for a three-year period. 6)Submit a cash escrow or letter of credit to cover 150 percent of the wetland buffer mitigation. The City will retain the escrow for up to three years as outlined in the maintenance agreement to ensure the wetland buffer mitigation is established and maintained. Overall Landscaping Review of the overall landscape plan to ensure nonnative or invasive species are avoided, seed mix is appropriate for use in areas proposed, and plantings are climate resilient. Landscaping Recommendation:Prior to issuance of a grading permit the applicant must submit revised plans with the following detail: Pending Natural Resources Coordinator Review Wildlife Impact Comments Sandhill cranes are protected migratory waterfowl, but they are not listed as endangered, threatened or special concern. Wildlife Impact Recommendation: Construction activity should not disturb or destroy active Sandhillcrane nests and should be avoided from April through May.