Case Study Of A Successful Sesc Plan

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Case Study Of A Successful Sesc Plan

  1. 1. Project Background Case Study of a 227 acre parcel in north central KaneSuccessful SESC Plan County, Illinois Agricultural  Residential Subdivision 291 Homes, Developed in Six Units H D l d i Si U it Jonathan Koepke, CPESC Curb and Gutter Resource Conservationist Kane- Kane-DuPage Soil & Water 5 Detention Basins Conservation District Project Background (cont.) AerialThree Planned Creek Crossings—Two Crossings—Permanent, One TemporaryOne Drainageway Permanently ImpactedObtained Corps of Engineers Permit whichrequires SWCD review and i i i d inspection of S il ti f SoilErosion and Sediment ControlArticle 3-Erosion and Sediment Control-of the 3- Control-Kane County Stormwater Ordinance isadministered by the CityNPDES Permit Coverage 1
  2. 2. Topography Map Water Features Soil Erosion andSediment Control Plan Total of 7 Sheets 2
  3. 3. SWCD Standard NotesKey Components y p 3
  4. 4. Legend of Practices Scheduling InformationPerimeter Silt Fence Stabilization Information 4
  5. 5. Stockpile Stabilization and Stabilization ProtectionEarly Completion of Basins Other Stabilization Driving Force Kane County Ordinance states that “[t]he area of disturbance onsite at any one time shall be limited to 20 acres. An additional 20 acres (a maximum of 40 acres of disturbance at any one time) may be stripped in order to balance cut and fill onsite”. Developer was told by City that he could not mass grade another phase until the existing disturbed areas were being stabilized 5
  6. 6. Diversion of Offsite Flow/Runoff Sediment Traps/BasinsErosion Control Blanket Location Protection of Detention Basins 6
  7. 7. Specific Instructions for Work in Critical Areas Work in Critical Areas Instructions resulted in an area-specific area- preconstruction meeting with the contractor, engineer, City, developer, and SWCD. Specific Plan was developed after meetingDrawings for Temporary Practices Drawings for Permanent Practices Note: See IUM for correct formula 7
  8. 8. Stabilized Entrances Clean Streets Inlet Protection Check Dams Not Recommended.Other practices/products available. 8
  9. 9. Energy Dissipation Energy Dissipation Note: See IUM for correct formulaDewatering Notes Inspection and Maintenance Notes 9
  10. 10. NPDES Signatory Requirements Looking Back Downstream end of diversion was constructed as a swale. Keeping it as confined channel all the way to the basin may have worked better. better Stockpile location shown on plans Questions?? 10

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