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905.00 GL908.21 TC907.71 GL908.87 B908.09 B908.21 TC907.71 GL905.00 CC905.00 CC905.60 TC905.10 GL904.29 B904.39 B905.47 TC905.17 GL906.17 TC905.67 GL905.54 TC/GL905.17 TC/GL906.22 TC905.72 GL905.60 TC/GL905.21 TC/GL906.22 TC905.72 GL905.69 TC/GL905.37 TC/GL905.30 TC*904.80 GL*905.34 TC*904.84 GL*906.34 TC905.84 GL905.75 TC/GL905.37 TC/GL906.65 TC906.15 GL906.27 TC905.77 GL906.15 TC905.65 GL906.36 TC905.86 GL906.04 TC905.54 GL904.6 B/EOF*904.5 B*905.32 B905.29 B905.55 TC905.05 GL905.2 B905.72 B906.10 B905.60 TC905.10 GL906.10 TC905.60 GL906.41 TC905.91 GL905.81 TC905.31 GL906.10 TC905.60 GL906.30 TC*905.80 GL*905.90 TC*905.40 GL*904.6 C/B*904.72 B905.3 B/C*904.3 B*904.3 B*906.60 TC906.10 GLINFILTRATION BASIN 1100-YR HWL = 904.45BTM = 902.00906.68 TC/GL906.98 B907.36 TC906.89 GL907.36 B906.80 B905.80 B905.00 GL906.03 TC905.73 GL906.95 TC906.45 GL906.76 TC906.26 GL907.39 TC906.89 GL907.01 TC906.51 GL907.02 TC906.52 GL906.69 TC906.19 GL906.85 TC906.35 GL906.85 TC906.35 GL906.64 TC906.14 GL906.64 TC906.14 GL907.02 TC906.52 GL906.69 TC906.19 GL904906907908 907907906908906907907906906 906906906906905905905905906906908
<br />9029039049072% MAX SLOPE INADA PARKING AREAFOR THE INFILTRATION BASIN BOTTOM,OVER-EXCAVATE APPROX. 1.7' - 2'TO REMOVE EXISTING TOPSOIL FILLMATERIAL. BACKFILL WITH A CLEAN,FREE DRAINING MATERIAL GRADEDACCORDING TO MEET MN/DOT 3149.2JSPECIFICATIONS.1122343524 Labore RoadWhite Bear Lake, MN 55110651.481.9120 (f) 651.481.9201www.larsonengr.com3524 Labore RoadWhite Bear Lake, MN 55110651.481.9120 (f) 651.481.9201www.larsonengr.comLarsonEngineering, Inc.0NORTH102040DRAWING NUMBERCPROJECT #1222066.000DRAWN BYDATE02-07-2023DRAWING TITLEDateRevision DescriptionDRAWINGSCONSTRUCTIONKK/JMJNCHECKED BYMADISON, WIMILWAUKEE, WIMAPLE GROVE, MNTHIS DRAWING IS PROPERTY OFNEXUS SOLUTIONS, LLC. USE OR REPRODUCTIONWITHOUT WRITTEN PERMISSION IS PROHIBITED.Nexus Solutions, LLCJUSTIN NIELSEN, P.E.I 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.PRINTED NAME:SIGNATURE:DATE: REG. NO.52687CENTENNIAL MIDDLE SCHOOL ISD#12TENNIS COURT RELOCATIONAND PARKING LOT ADDITION399 ELM STREETLINO LAKES, MN 5501402/07/2023P:\Projects\Projects - 2022\12226066 - Centennial MS Tennis Courts\C. Design\Drawing Files\12226066 C300-C301 - Grading.dwgLEGENDGRADING NOTESPARKING LOT ADDITIONGRADING AND EROSIONCONTROL PLANC3011.Owner and Contractor shall obtain MPCA-NPDES permit.Contractor shall be responsible for all fees pertaining to thispermit. The SWPPP shall be kept onsite at all times.2.Install temporary erosion control measures (inlet protection,silt fence, and rock construction entrances) prior tobeginning any excavation or demolition work at the site.3.Erosion control measures shown on the erosion control planare the absolute minimum. The contractor shall installtemporary earth dikes, sediment traps or basins, additionalsiltation fencing, and/or disk the soil parallel to the contoursas deemed necessary to further control erosion. Allchanges shall be recorded in the SWPPP.4.All construction site entrances shall be surfaced withcrushed rock across the entire width of the entrance andfrom the entrance to a point 50' into the construction zone.5.The toe of the silt fence shall be trenched in a minimum of6”. The trench backfill shall be compacted with a vibratoryplate compactor.6.All grading operations shall be conducted in a manner tominimize the potential for site erosion. Sediment controlpractices must be established on all down gradientperimeters before any up gradient land disturbing activitiesbegin.7.All exposed soil areas must be stabilized as soon aspossible to limit soil erosion but in no case later than 7 daysafter the construction activity in that portion of the site hastemporarily or permanently ceased. Temporary stockpileswithout significant silt, clay or organic components (e.g.,clean aggregate stockpiles, demolition concrete stockpiles,sand stockpiles) and the constructed base components ofroads, parking lots and similar surfaces are exempt from thisrequirement.8.All storm sewer catch basins not needed for site drainageduring construction shall be covered to prevent runoff fromentering the storm sewer system. Catch basins necessaryfor site drainage during construction shall be provided withinlet protection.9.In areas where concentrated flows occur (such as swalesand areas in front of storm catch basins and intakes) theerosion control facilities shall be backed by stabilizationstructure to protect those facilities from the concentratedflows.10.Inspect the construction site once every seven days duringactive construction and within 24 hours after a rainfall eventgreater than 0.5 inches in 24 hours. All inspections shall berecorded in the SWPPP.11.All silt fences must be repaired, replaced, or supplementedwhen they become nonfunctional or the sediment reaches1/3 of the height of the fence. These repairs must be madewithin 24 hours of discovery, or as soon as field conditionsallow access. All repairs shall be recorded in the SWPPP.12.If sediment escapes the construction site, off-siteaccumulations of sediment must be removed in a mannerand at a frequency sufficient to minimize off-site impacts.13.All soils tracked onto pavement shall be removed daily.14.All infiltration areas must be inspected to ensure that nosediment from ongoing construction activity is reaching theinfiltration area and these areas are protected fromcompaction due to construction equipment driving acrossthe infiltration area.15.Temporary soil stockpiles must have silt fence or othereffective sediment controls, and cannot be placed in surfacewaters, including stormwater conveyances such as curb andgutter systems, or conduits and ditches unless there is abypass in place for the stormwater.16.Collected sediment, asphalt and concrete millings, floatingdebris, paper, plastic, fabric, construction and demolitiondebris and other wastes must be disposed of properly andmust comply with MPCA disposal requirements.17.Oil, gasoline, paint and any hazardous substances must beproperly stored, including secondary containment, to preventspills, leaks or other discharge. Restricted access tostorage areas must be provided to prevent vandalism.Storage and disposal of hazardous waste must be incompliance with MPCA regulations.18.External washing of trucks and other construction vehiclesmust be limited to a defined area of the site. Runoff must becontained and waste properly disposed of. No enginedegreasing is allowed onsite.19.All liquid and solid wastes generated by concrete washoutoperations must be contained in a leak-proof containmentfacility or impermeable liner. A compacted clay liner thatdoes not allow washout liquids to enter ground water isconsidered an impermeable liner. The liquid and solidwastes must not contact the ground, and there must not berunoff from the concrete washout operations or areas.Liquid and solid wastes must be disposed of properly and incompliance with MPCA regulations. A sign must be installedadjacent to each washout facility to inform concreteequipment operators to utilize the proper facilities.20.Upon completion of the project and stabilization of all gradedareas, all temporary erosion control facilities (silt fences, haybales, etc.) shall be removed from the site.21.Contractor shall submit Notice of Termination forMPCA-NPDES permit within 30 days after FinalStabilization.EROSION CONTROL NOTESPROPOSED CONTOURS - MAJOR INTERVALGRADE BREAK LINEPROPOSED CONTOURS - MINOR INTERVAL949950950EXISTING CONTOURS2.0%950.00 TC949.50 GLGRADE SLOPESPOT ABBREVIATIONS:SEDIMENT LOGRIP-RAP / ROCK CONST. ENTRANCEINLET PROTECTIONCONCRETE WASHOUT STATION(LOCATE DURING CONSTRUCTION)TC - TOP OF CURBGL - GUTTER LINEB - BITUMUNOUSC - CONCRETEOF - OVERFLOWTW - TOP OF WALLBW - BOTTOM OF WALL (F/G)(*) - EXISTING TO BE VERIFIEDTS - TOP OF STEPBS - BOTTOM OF STEPEROSION CONTROL BLANKETKEY NOTESKEY NOTESRIP RAP AT CURB CUT, SEE DETAIL 9/C501RIP RAP AT RAIN GUARDIAN STRUCTURE, SEE DETAIL 2/C502INFILTRATION BASIN, SEE DETAIL 1/C502ROCK CONSTRUCTION ENTRANCE, SEE DETAIL 8/C50112341.Tree protection consisting of snow fence or safety fence installed at thedrip line shall be in place prior to beginning any grading or demolitionwork at the site.2.All elevations with an asterisk (*) shall be field verified. If elevationsvary significantly, notify the Engineer for further instructions.3.Grades shown in paved areas represent finish elevation.4.Restore all disturbed areas with 4” of good quality topsoil and seed.5.All construction shall be performed in accordance with state and localstandard specifications for construction.6.Provide an as-built survey of the infiltration basin, showingcompliance with the project documents.NOT TO SCALEKEY PLAN
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