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WBL TRANSPORTATION FACILITYFFE: 935.00 (ARCH: 100'-0")WBL TRANSPORTATION FACILITYFFE: 935.00 (ARCH: 100'-0")934.88 G935.00 FFE935.50 TC935.00 GL934.95 C934.44 C934.23 B934.95 C934.60 TC934.10 GL934.84 TC934.34 GL934.64 TC934.14 GL934.34 B934.97 TC934.47 GL934934934934934934934934935935935934933933934934935935935935935935934933932931930929928932932933934933934933932931930929928934934934933932931931931932933934 931931934933932931930929928933932931930929928928929930931932933935934934933932931930933
<br />932
<br />93
<br />1
<br />930 928929930931934934
<br />934934934933929
<br />928
<br />927.52 TC*927.02 GL*933.27 TC932.77 RIM934.74 TC934.34 GL935.05 TC934.55 GL933.16 CC933.85 TC933.55 GL934.14 TC933.84 GL935.00 FFE934.73 C934.40 GL/TC934.71 TC934.21 GL934.73 C935.30 TC935.00 GL933.34 TC933.04 GL934.43 TC934.13 GL934.74 TC934.24 GL935.01 TC934.51 GL934.64 TC934.14 GL935.09 TC934.59 GL933.00 RIM933.00 RIM933.00 RIM933.00 RIM935.45 TC935.15 GL934.26 G934.14 TC933.84 GL933.84 G933.84 G934.34 TC933.84 GL934.34 TC933.84 GL935.65 TC935.15 GL935.15 G935.65 TC935.15 GL934.26 G934.56 TC934.26 GL934.56 TC934.26 GL935.45 TC935.15 GL934.84 TC934.57 GL934.84 TC934.57 GL934.83 TC934.53 GL934.83 TC934.53 GL935.09 TC934.79 GL935.09 TC934.79 GL934.71 TC934.21 GL935.45 TC935.15 GL932.95 TC/GL933.00 TC/GL934.01 TC933.71 GL933.71 TC933.21 GL934.51 B930.56 TC930.26 GL931.52 TC931.02 GL935.65 TC935.15 GL934.20 GL/TC934.93 C934.71 C928.19 TC*927.69 GL*931.00 TC930.50 GL929.89 TC929.39 GL930.30 CC931.34 TC930.84 GL934.43 TC933.93 GL934.43 TC933.93 GL931.78 TC931.28 GL929.13 TC*928.63 GL*928.77 TC*928.27 GL*930.00 CC934.52934.02 GL934.51 C933.42 TC932.92 RIM934.50 TC934.00 GL933.51 TC933.01 GL931.96 TC931.46 GL931.15 TC930.65 GL930.96 TC930.46 GL931.75 TC931.25 GL932.03 TC931.53 GL933.00 GL/TC933.22 GL/TC930.20 (EOF)930.04 GLINFILTRATION BASIN #1BASIN BTM: 928.00OUTLET: 929.60100-YEAR HWL: 930.66INFILTRATION BASIN #2BASIN BTM: 928.00OUTLET: 930.20100-YEAR HWL: 930.33930.70 (EOF)934.50 G928.90 GOVER EXCAVATE APRROXIMATELY 1',WHERE REQUIRED TO REACH SP SOILS.BACKFILL WITH AMENDED SOIL MEDIA.OVER EXCAVATE APRROXIMATELY 1.5',WHERE REQUIRED TO REACH SP SOILS.BACKFILL WITH AMENDED SOIL MEDIA.OVER EXCAVATE APRROXIMATELY 1.5',WHERE REQUIRED TO REACH SP SOILS.BACKFILL WITH AMENDED SOIL MEDIA.931.26 TC930.76 GL930.93 TC930.43 GL931.57 TC931.07 GL931.79 TC930.79 GL934.14 TC933.64 GL934.46 TC933.96 GL934.01 TC933.51 GL934.41 TC933.91 GL935.50 TC935.00 GL927.23 GL927.48 GL928.61 TC928.11 GL929.82 TC929.32 GL931.34 TC930.84 GL928.36 TC927.86 GL933.10 C934.59 C934.37 C933.36 TC932.86 GL933.37 C935.09 C933.93 TS933.42 BS934.51 TS933.99 BS935.09 TS934.57 BS935.00 FFE934.90 C930935.50 TC935.00 GL935.12 TC934.62 GL934.78 TC934.28 GL935.00 C934.26 TC934.76 GL934.60 TC934.10 GL1C6011C6011C6011C6011C6011C6011C6011C6017C6017C60110C60110C60110C60110C60110C6018C6019C6019C6019C6019C6019C6019C6016C601(TYP.)6C601(TYP.)6C601(TYP.)6C601(TYP.)3524 Labore RoadWhite Bear Lake, MN 55110651.481.9120 (f) 651.481.9201www.larsonengr.comC 2020 Larson Engineering, Inc. All rights reserved.P:\Projects\Projects - 2019\12196171 - WBL School New Bus Facility\C. Design\Drawing Files\Archive Files\2020.09.29 - Before Stormwater Revisions\12196171 - C300-302 Grading Plan.dwg3524 Labore RoadWhite Bear Lake, MN 55110651.481.9120 (f) 651.481.9201www.larsonengr.comLarsonEngineering, Inc.0NORTH153060MNNorthCheck:Drawn:Date:Comm:Greg A. Buchal, P.E.Date: Lic. No.:I 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.FEDCBA12345678INDEPENDENT SCHOOLDISTRICT #624WBLTRANSPORTATIONFACILITY4855 Bloom AvenueWhite Bear Lake, MN 5511013411 Fenway Blvd NHugo, MN 55038GABMTH08.14.202012196171RevisionsDescriptionDateNum08.14.2023793Addendum 1August 26, 20201Addendum 2September 1, 20202City CommentsSeptember 30, 20203C300GRADING ANDEROSIONCONTROLPLANPROPOSED CONTOURS - MAJOR INTERVALGRADE BREAK LINEPROPOSED CONTOURS - MINOR INTERVAL949950950EXISTING CONTOURS2.0%950.00 TC949.50 GLGRADE SLOPESPOT ABBREVIATIONS:SILT FENCERIP-RAP / ROCK CONST. ENTRANCEINLET PROTECTIONCONCRETE WASHOUT STATION(LOCATE DURING CONSTRUCTION)LEGEND1.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 plan are the absolute minimum. The contractor shall installtemporary earth dikes, sediment traps or basins, additional siltation fencing, and/or disk the soil parallel to the contoursas deemed necessary to further control erosion. All changes shall be recorded in the SWPPP.4.All construction site entrances shall be surfaced with crushed rock across the entire width of the entrance and from theentrance 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 be compacted with a vibratoryplate compactor.6.All grading operations shall be conducted in a manner to minimize the potential for site erosion. Sediment controlpractices must be established on all down gradient perimeters before any up gradient land disturbing activities begin.7.All exposed soil areas must be stabilized as soon as possible to limit soil erosion but in no case later than 7 days afterthe construction activity in that portion of the site has temporarily or permanently ceased. Temporary stockpiles withoutsignificant silt, clay or organic components (e.g., clean aggregate stockpiles, demolition concrete stockpiles, sandstockpiles) and the constructed 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 drains water from any portionof the construction site, or diverts water around the site, must be stabilized within 200 lineal feet from the propertyedge, or from the point of discharge into any surface water. Stabilization of the last 200 lineal feet must be completedwithin 24 hours after connecting to a surface water. Stabilization of the remaining portions of any temporary orpermanent ditches or swales must be complete within 7 days after connecting to a surface water and construction inthat portion of the ditch has temporarily or permanently ceased.9.Pipe outlets must be provided with energy dissipation within 24 hours of connection to surface water.10.All riprap shall be installed with a filter material or soil separation fabric and comply with the Minnesota Department ofTransportation Standard Specifications.11.All storm sewers discharging into wetlands or water bodies shall outlet at or below the normal water level of therespective wetland or water body at an elevation where the downstream slope is 1 percent or flatter. The normal waterlevel shall be the invert elevation of the outlet of the wetland or water body.12.All storm sewer catch basins not needed for site drainage during construction shall be covered to prevent runoff fromentering the storm sewer system. Catch basins necessary for site drainage during construction shall be provided withinlet protection.13.In areas where concentrated flows occur (such as swales and areas in front of storm catch basins and intakes) theerosion control facilities shall be backed by stabilization structure to protect those facilities from the concentrated flows.14.Inspect the construction site once every seven days during active construction and within 24 hours after a rainfall eventgreater than 0.5 inches in 24 hours. All inspections shall be recorded in the SWPPP.15.All silt fences must be repaired, replaced, or supplemented when they become nonfunctional or the sediment reaches1/3 of the height of the fence. These repairs must be made within 24 hours of discovery, or as soon as field conditionsallow access. All repairs shall be recorded in the SWPPP.16.If sediment escapes the construction site, off-site accumulations of sediment must be removed in a manner and at afrequency sufficient to minimize off-site impacts.17.All soils tracked onto pavement shall be removed daily.18.All infiltration areas must be inspected to ensure that no sediment from ongoing construction activity is reaching theinfiltration area and these areas are protected from compaction due to construction equipment driving across theinfiltration area.19.Temporary soil stockpiles must have silt fence or other effective sediment controls, and cannot be placed in surfacewaters, including stormwater conveyances such as curb and gutter systems, or conduits and ditches unless there is abypass in place for the stormwater.20.Collected sediment, asphalt and concrete millings, floating debris, paper, plastic, fabric, construction and demolitiondebris and other wastes must be disposed of properly and must comply with MPCA disposal requirements.21.Oil, gasoline, paint and any hazardous substances must be properly stored, including secondary containment, toprevent spills, leaks or other discharge. Restricted access to storage areas must be provided to prevent vandalism.Storage and disposal of hazardous waste must be in compliance with MPCA regulations.22.External washing of trucks and other construction vehicles must be limited to a defined area of the site. Runoff must becontained and waste properly disposed of. No engine degreasing is allowed onsite.23.All liquid and solid wastes generated by concrete washout operations must be contained in a leak-proof containmentfacility or impermeable liner. A compacted clay liner that does not allow washout liquids to enter ground water isconsidered an impermeable liner. The liquid and solid wastes 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 installed adjacent to each washout facility to inform concreteequipment operators to utilize the proper facilities.24.Upon completion of the project and stabilization of all graded areas, all temporary erosion control facilities (silt fences,hay bales, etc.) shall be removed from the site.25.All permanent sedimentation basins must be restored to their design condition immediately following stabilization of thesite.26.Contractor shall submit Notice of Termination for MPCA-NPDES permit within 30 days after Final Stabilization.27.Erosion control blankets are to be placed on all slopes 4:1 or greater. Reference sheet C500 for erosion controlblanket placement.EROSION CONTROL NOTESGRADING NOTES1.Tree protection consisting of snow fence or safety fence installed at the drip line shall be in place prior to beginningany grading or demolition work at the site.2.All elevations with an asterisk (*) shall be field verified. If elevations vary significantly, notify the Engineer for furtherinstructions.3.Grades shown in paved areas represent finish elevation.4.All construction shall be performed in accordance with state and local standard specifications for construction.INFILTRATION BASINSEDIMENT ROLLTC - TOP OF CURBGL - GUTTER LINEB - BITUMUNOUSG - GRADEC - CONCRETECC - CURB CUTEOF - EMERGENCY OVERFLOWTS - TOP OF STEPBS - BOTTOM OF STEP(*) - EXISTING TO BE VERIFIED
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