|
PROPOSED BUILDINGPROPOSED BUILDINGPROPOSED BUILDINGPROPOSED BUILDINGPROPOSED BUILDINGPROPOSED BUILDINGPROPOSED BUILDINGPROPOSED BUILDING911910909908909908100-YR HWL = 907.94100-YR HWL = 908.82FFE = 911.67GFE = 910.84FFE = 911.67GFE = 910.84FFE = 911.67GFE = 910.84FFE = 911.67GFE = 910.84FFE = 911.67GFE = 910.84FFE = 911.67GFE = 910.84FFE = 911.67GFE = 910.84FFE = 911.67GFE = 910.84909.00 GL*909.25 GL*910.55 BHP910.48 TC910.15 GL909.77 TC909.44 GL LP3' CURB CUT909.94 B909.50 C909.71 CEOF909.61 C909.40 C910.17 TC909.84 GL910.34 B909.98 TC909.65 GL910.15 B909.86 TC909.53 GL910.08 TC909.75 GL910.25 B910.37 TC910.04 GL910.77 TC910.44 GL910.17 TC909.84 GL909.44 B910.35 B910.44 B910.44 B907.55 EOF9072.95%3.92%3.38%3.62%4.59%4.45%2.25%910.02 TC909.69 GL2.69%911.17 G911.00 G911.17 G911.00 G908.50 G908.50 G908.50 G908.50 G910.84 G910.84 G910.84 G910.84 G910.84 G910.84 G909.83 TC909.50 GL907906905908909910910
<br />910910907906905908907906905908910910909910910909908907#4#6#8#14#50#80#81#82LONG LAKE RD.COUNTY RD. IEXISTING BUILDINGEXISTING BUILDING15"RCPCBRIM=910.8INV=907.1911912912911912911911910910911909909909908907906905906907908910909910911912912 912912911911910909909909910910911913CBRIM=911.8INV=906.6STS MHRIM=912.6INV=905.5515"RCP
<br />15"RCPSAN MHRIM=911.8INV=887.7(SLUDGE)SAN MHRIM=912.3INV=889.3 NINV=? E-WSAN MHRIM=911.1INV=889.8SAN MHRIM=910.0INV=890.912"CIP6"CIP6"CIP60" WATERMAIN60" WATERMAIN60" WATERMAIN60" WATERMAIN122234445222DescriptionRev. DateLONG LAKE ROADRESIDENTIALDEVELOPMENTMOUNDS VIEW, MNSheet Title:Project #:Drawn By:Checked By:Issue Date:12226046KBKTJH06.16.223524 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\12226046 - Mounds View Residential\C. Design\Drawing Files\12226046 C300.dwgLarsonEngineering, Inc.Project Title:SCHIFSKYCOMPANIES10922 STONEBRIDGE TRAIL N.STILLWATER, MN 55082Client:Thomas J. Herkenhoff, P.E.Date:Lic. No.:I hereby certify that this plan,specifications or report was preparedby me or under my direct supervisionand that I am a duly licensedProfessional Engineer under the lawsof the state of Minnesota.PRELIMINARY NOT FOR CONSTRUCTION0NORTH10 2040Sheet:GRADING ANDEROSION CONTROLPLANC300PROPOSED CONTOURS - MAJOR INTERVALGRADE BREAK LINEPROPOSED CONTOURS - MINOR INTERVAL949950950EXISTING CONTOURS2.0%950.00 TC949.50 GLGRADE SLOPESPOT ABBREVIATIONS:TC - TOP OF CURBGL - GUTTER LINEB - BITUMINOUSC - CONCRETEG - GROUNDEOF - EMERGENCY OVERFLOWLP - LOW POINTHP - HIGH POINT(*) - EXISTING TO BE VERIFIEDSILT FENCERIP-RAP / ROCK CONST. ENTRANCEINLET PROTECTION1. Owner and Contractor shall obtain MPCA-NPDES permit. Contractor shall be responsible for all fees pertaining to this permit. The SWPPPshall be kept onsite at all times.2. Install temporary erosion control measures (inlet protection, silt fence, and rock construction entrances) prior to beginning any excavation ordemolition work at the site.3. Erosion control measures shown on the erosion control plan are the absolute minimum. The contractor 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 controlerosion. 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 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 be compacted 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 beestablished 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 14 days after the constructionactivity in that portion of the site has temporarily or permanently ceased. Temporary stockpiles without significant silt, clay or organiccomponents (e.g., clean aggregate stockpiles, demolition concrete stockpiles, sand stockpiles) and the constructed base components of roads,parking lots and similar surfaces are exempt from this requirement.8. The normal wetted perimeter of any temporary or permanent drainage ditch or swale that drains water from any portion of the construction site,or diverts water around the site, must be stabilized within 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 connecting to a surface water. Stabilization of theremaining portions of any temporary or permanent ditches or swales must be complete within 14 days after connecting to a surface water andconstruction in that 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 of Transportation StandardSpecifications.11. All storm sewers discharging into wetlands or water bodies shall outlet at or below the normal water level of the respective wetland or waterbody at an elevation where the downstream slope is 1 percent or flatter. The normal water level shall be the invert elevation of the outlet of thewetland or water body.12. All storm sewer catch basins not needed for site drainage during construction shall be covered to prevent runoff from entering the storm sewersystem. Catch basins necessary for site drainage during construction shall be provided with inlet protection.13. In areas where concentrated flows occur (such as swales and areas in front of storm catch basins and intakes) the erosion control facilitiesshall 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 event greater than 0.5 inchesin 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 reaches 1/3 of the height of thefence. These repairs must be made within 24 hours of discovery, or as soon as field conditions allow access. All repairs shall be recorded inthe SWPPP.16. If sediment escapes the construction site, off-site accumulations of sediment must be removed in a manner and at a frequency sufficient tominimize 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 the infiltration area and theseareas are protected from compaction due to construction equipment driving across the infiltration area.19. Temporary soil stockpiles must have silt fence or other effective sediment controls, and cannot be placed in surface waters, includingstormwater conveyances such as curb and gutter systems, or conduits and ditches unless there is a bypass in place for the stormwater.20. Collected sediment, asphalt and concrete millings, floating debris, paper, plastic, fabric, construction and demolition debris and other wastesmust 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, to prevent spills, leaks or otherdischarge. Restricted access to storage areas must be provided to prevent vandalism. Storage and disposal of hazardous waste must be incompliance with MPCA regulations.22. External washing of trucks and other construction vehicles must be limited to a defined area of the site. Runoff must be contained and wasteproperly 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 containment facility or impermeableliner. A compacted clay liner that does not allow washout liquids to enter ground water is considered an impermeable liner. The liquid andsolid wastes must not contact the ground, and there must not be runoff from the concrete washout operations or areas. Liquid and solidwastes must be disposed of properly and in compliance with MPCA regulations. A sign must be installed adjacent to each washout facility toinform concrete equipment 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 beremoved from the site.25. All permanent sedimentation basins must be restored to their design condition immediately followingstabilization of the site.26. Contractor shall submit Notice of Termination for MPCA-NPDES permit within 30 days afterFinal Stabilization.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 X” of good quality topsoil and seed.5. All construction shall be performed in accordance with state and localstandard specifications for construction.SYMBOL LEGENDKEY NOTESROCK CONSTRUCTION ENTRANCE,SEE DETAIL 4/C501SILT FENCE,SEE DETAIL 5/C501RIP RAP WIER OVERFLOW,SEE DETAIL 6/C501EROSION CONTROL BLANKET,SEE DETAIL 7/C501INLET PROTECTION,SEE DETAIL 8/C5011234EROSION CONTROL BLANKET5
|