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988.10 FFE*986.97 TC986.47 GL1.5%988.1 FFE*985.88 C*985.98 C*5.0% max987.27 TC986.77 GL987.27 TC986.77 GL987986988INFILTRATION BASIN 1BOTTOM = 983.00100-YR HWL = 986.39985983984985983984986987986986987987EOF = 986.25EOF = 986.2OVER-EXCAVATE BOTTOM OF BASINUNTIL SILTY SANDS, SP-SM, SOILSARE ENCOUNTERED (APPROX. 1' - 3').BACKFILL WITH CLEAN, FREEDRAINING SOIL.KELLER AVENUE NORTH10158 122ND STREET NORTH122ND STREET NORTHCOVEREDWELL ACCESSSHEDTRASHENCLOSURE(FORMERLY KNOWN AS TOWNSHIP ROAD NO. 13)(FORMERLY KNOWN AS COUNTY ROAD NO. 6)WRIP-RAP9"SPRUCE15"SPRUCE15"SPRUCE6"BOX ELDER15"SPRUCE12"SPRUCE12"SPRUCE12"SPRUCE12"SPRUCE15"SPRUCE12"SPRUCE12"SPRUCE15"OAK12"MAPLE6"LOCUST12"BASSWOOD6"MAPLE12"ASH9"LOCUST18"MAPLEI.E=981.14 (N)15-INCH R.C.P.R.E.= 987.48I.E.= 981.6(N)I.E.= 981.7(S)ICE IN INVERTR.E.= 987.39I.E.= 981.7(N)I.E.= 981.8(S)R.E.= 987.54I.E.= 982.9(E)R.E.= 987.52I.E.= 982.7(E)I.E.= 983.0(NW)R.E.= 987.28I.E.= 982.0(N)I.E.= 981.8(S)I.E.= 982.5(W)R.E.= 987.49I.E.= 982.3(NW)I.E.= 982.2(SE)I.E.= 982.6(W)R.E.= 987.49I.E.= 982.9(E)I.E.= 983.1(SW)I.E.= 983.2(NW)R.E.= 987.54I.E.= 982.3(SE)I.E.= 983.4(SW)12-INCH PVC12-INCH PVC12-INCH PVC12-INCH PVC12-INCH PVC12-INCH PVC12-INCH PVC12-INCH PVC12-INCH PVC12-INCH R.C.P.98598398498698798098098198198298298898898898898898898898898198198298215" CMP15" CMP24" CMP12" CMPBORING 3BORING 2BORING 1BORING 4SILT FENCESILT FENCESILT FENCEBIO-LOGINLET PROTECTION, TYPSILT FENCE3524 Labore RoadWhite Bear Lake, MN 55110651.481.9120 (f) 651.481.9201www.larsonengr.comC 2022 Larson Engineering, Inc. All rights reserved.P:\Projects\Projects - 2022\12226016 - Liberty Classical Acad Hugo - Pope\C. Design\Drawing Files\12226016 C300.dwgLarsonEngineering, Inc.Eric G. Meyer, P.E.Date: Lic. No.:03.22.2244592I hereby certify that this plan, specifications or reportwas prepared by me or under my direct supervisionand that I am a duly licensed Professional Engineerunder the laws of the state of Minnesota.0NORTH102040Issues and Revisions:Commission No:Drawn by:Checked by:SHEET1295 BANDANA BLVD N, SUITE 200ST. PAUL, MN 55108-2735(651) 642-9200 | FAX (651) 642-1101www.popearch.comPOPE ARCHITECTS, INC.EGMKBK12226016LIBERTY CLASSICALACADEMY PHASE 110158 122nd ST N,HUGO, MN 55038BP2 - Permit Set3-22-22BCWD Comments4-11-22PROPOSED CONTOURS - MAJOR INTERVALGRADE BREAK LINEPROPOSED CONTOURS - MINOR INTERVAL949950950EXISTING CONTOURS2.0%950.00 TC949.50 GLGRADE SLOPESPOT ABBREVIATIONS:TC - TOP OF CURBGL - GUTTER LINEGO - GUTTER OUTB - BITUMINOUSC - CONCRETEEO - EMERGENCY OVERFLOWTW - TOP OF WALLBW - BOTTOM OF WALL (F/G)(*) - EXISTING TO BE VERIFIEDSILT FENCE, SEE DETAIL 7/C500ROCK CONST. ENTRANCE, FIELD LOCATE, DETAIL 6/C500INLET PROTECTION, SEE DETAIL 9/C5001.Owner and Contractor shall obtain MPCA-NPDES permit. Contractor shall be responsible for allfees pertaining to this permit. The SWPPP shall be kept onsite at all times.2.Install temporary erosion control measures (inlet protection, silt fence, and rock constructionentrances) prior to beginning any excavation or demolition work at the site.3.Erosion control measures shown on the erosion control plan are the absolute minimum. Thecontractor shall install temporary earth dikes, sediment traps or basins, additional siltation fencing,and/or disk the soil parallel to the contours as deemed necessary to further control erosion. Allchanges shall be recorded in the SWPPP.4.All construction site entrances shall be surfaced with crushed rock across the entire width of theentrance and from the entrance to a point 50' into the construction zone.5.The toe of the silt fence shall be trenched in a minimum of 6”. The trench backfill shall becompacted with a vibratory plate compactor.6.All grading operations shall be conducted in a manner to minimize the potential for site erosion.Sediment control practices must be established on all down gradient perimeters before any upgradient land disturbing activities begin.7.All exposed soil areas must be stabilized as soon as possible to limit soil erosion but in no caselater than 14 days after the construction activity in that portion of the site has temporarily orpermanently ceased. Temporary stockpiles without significant silt, clay or organic components(e.g., clean aggregate stockpiles, demolition concrete stockpiles, sand stockpiles) and theconstructed base components of roads, parking lots and similar surfaces are exempt from thisrequirement.8.The normal wetted perimeter of any temporary or permanent drainage ditch or swale that drainswater from any portion of the construction site, or diverts water around the site, must be stabilizedwithin 200 lineal feet from the property edge, or from the point of discharge into any surfacewater. Stabilization of the last 200 lineal feet must be completed within 24 hours after connectingto a surface water. Stabilization of the remaining portions of any temporary or permanent ditchesor swales must be complete within 14 days after connecting to a surface water and construction inthat portion of the ditch has temporarily or permanently ceased.9.All riprap shall be installed with a filter material or soil separation fabric and comply with theMinnesota Department of Transportation Standard Specifications.10.All storm sewer catch basins not needed for site drainage during construction shall be covered toprevent runoff from entering the storm sewer system. Catch basins necessary for site drainageduring construction shall be provided with inlet protection.11.In areas where concentrated flows occur (such as swales and areas in front of storm catch basinsand intakes) the erosion control facilities shall be backed by stabilization structure to protect thosefacilities from the concentrated flows.12.Inspect the construction site once every seven days during active construction and within 24hours after a rainfall event greater than 0.5 inches in 24 hours. All inspections shall be recordedin the SWPPP.13.All BMPs must be repaired, replaced, or supplemented when they become nonfunctional or thesediment reaches 1/3 of the capacity. These repairs must be made within 24 hours of discovery,or as soon as field conditions allow access. All repairs shall be recorded in the SWPPP.14.If sediment escapes the construction site, off-site accumulations of sediment must be removed ina manner and at a frequency sufficient to minimize off-site impacts.15.All soils tracked onto pavement shall be removed daily.16.All infiltration areas must be inspected to ensure that no sediment from ongoing constructionactivity is reaching the infiltration area and these areas are protected from compaction due toconstruction equipment driving across the infiltration area.17.Temporary soil stockpiles must have silt fence or other effective sediment controls, and cannot beplaced in surface waters, including stormwater conveyances such as curb and gutter systems, orconduits and ditches unless there is a bypass in place for the stormwater.18.Collected sediment, asphalt and concrete millings, floating debris, paper, plastic, fabric,construction and demolition debris and other wastes must be disposed of properly and mustcomply with MPCA disposal requirements.19.Oil, gasoline, paint and any hazardous substances must be properly stored, including secondarycontainment, to prevent spills, leaks or other discharge. Restricted access to storage areas mustbe provided to prevent vandalism. Storage and disposal of hazardous waste must be incompliance with MPCA regulations.20.External washing of trucks and other construction vehicles must be limited to a defined area of thesite. Runoff must be contained and waste properly disposed of. No engine degreasing is allowedonsite.21.All liquid and solid wastes generated by concrete washout operations must be contained in aleak-proof containment facility or impermeable liner. A compacted clay liner that does not allowwashout liquids to enter ground water is considered an impermeable liner. The liquid and solidwastes must not contact the ground, and there must not be runoff from the concrete washoutoperations or areas. Liquid and solid wastes must be disposed of properly and in compliance withMPCA regulations. A sign must be installed adjacent to each washout facility to inform concreteequipment operators to utilize the proper facilities.22.Upon completion of the project and stabilization of all graded areas, all temporary erosion controlfacilities (silt fences, hay bales, etc.) shall be removed from the site.23.All permanent sedimentation basins must be restored to their design condition immediatelyfollowing stabilization of the site.24.Contractor shall submit Notice of Termination for MPCA-NPDES permit within 30 days after FinalStabilization.EROSION CONTROL NOTESGRADING NOTES1.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. SeeLandscape Plan for additional requirements.5.All construction shall be performed in accordance with state and localstandard specifications for construction.SYMBOL LEGENDEROSION CONTROLPLANGRADING ANDC300SEDIMENT LOG, SEE DETAIL 8/C500
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