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Case Study of a Case Study of a Successful SESC PlanSuccessful SESC Plan

Jonathan Koepke, CPESC Jonathan Koepke, CPESC Resource ConservationistResource Conservationist

KaneKane--DuPage Soil & Water DuPage Soil & Water Conservation DistrictConservation District

Project BackgroundProject Background

227 acre parcel in north central Kane 227 acre parcel in north central Kane County, IllinoisCounty, Illinois

Agricultural Agricultural Residential SubdivisionResidential Subdivision

291 H D l d i Si U it291 H D l d i Si U it291 Homes, Developed in Six Units291 Homes, Developed in Six Units

Curb and GutterCurb and Gutter

5 Detention Basins5 Detention Basins

Project Background (cont.)Project Background (cont.)

Three Planned Creek CrossingsThree Planned Creek Crossings——Two Two Permanent, One TemporaryPermanent, One TemporaryOne Drainageway Permanently ImpactedOne Drainageway Permanently ImpactedObtained Corps of Engineers Permit which Obtained Corps of Engineers Permit which

i SWCD i d i ti f S ili SWCD i d i ti f S ilrequires SWCD review and inspection of Soil requires SWCD review and inspection of Soil Erosion and Sediment Control Erosion and Sediment Control Article 3Article 3--Erosion and Sediment ControlErosion and Sediment Control--of the of the Kane County Stormwater Ordinance is Kane County Stormwater Ordinance is administered by the Cityadministered by the CityNPDES Permit Coverage NPDES Permit Coverage

AerialAerial

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Topography MapTopography Map Water FeaturesWater Features

Soil Erosion and Soil Erosion and Sediment Control PlanSediment Control Plan

Total of 7 SheetsTotal of 7 Sheets

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Key ComponentsKey Componentsy py p

SWCD Standard NotesSWCD Standard Notes

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Legend of PracticesLegend of Practices Scheduling InformationScheduling Information

Perimeter Silt FencePerimeter Silt Fence Stabilization InformationStabilization Information

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StabilizationStabilizationStockpile Stabilization and Stockpile Stabilization and

ProtectionProtection

Early Completion of BasinsEarly Completion of Basins Other Stabilization Driving ForceOther Stabilization Driving Force

Kane County Ordinance states that “[t]he area of Kane County Ordinance states that “[t]he area of disturbance onsite at any one time shall be disturbance onsite at any one time shall be limited to 20 acres. An additional 20 acres (a limited to 20 acres. An additional 20 acres (a maximum of 40 acres of disturbance at any one maximum of 40 acres of disturbance at any one time) may be stripped in order to balance cut time) may be stripped in order to balance cut and fill onsite”.and fill onsite”.

Developer was told by City that he could not mass Developer was told by City that he could not mass grade another phase until the existing disturbed grade another phase until the existing disturbed areas were being stabilizedareas were being stabilized

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Diversion of Offsite Flow/RunoffDiversion of Offsite Flow/Runoff Sediment Traps/BasinsSediment Traps/Basins

Erosion Control Blanket LocationErosion Control Blanket Location Protection of Detention BasinsProtection of Detention Basins

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Specific Instructions for Work in Specific Instructions for Work in Critical AreasCritical Areas Work in Critical AreasWork in Critical Areas

Instructions resulted Instructions resulted in an areain an area--specific specific preconstruction preconstruction meeting with the meeting with the contractor, engineer, contractor, engineer, City, developer, and City, developer, and SWCD.SWCD.

Specific Plan was Specific Plan was developed after developed after meeting meeting

Drawings for Temporary PracticesDrawings for Temporary Practices Drawings for Permanent PracticesDrawings for Permanent Practices

Note: See IUM for correct formula

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Stabilized EntrancesStabilized Entrances Clean StreetsClean Streets

Inlet ProtectionInlet Protection

Not Recommended.Other practices/products available.

Check DamsCheck Dams

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Energy DissipationEnergy Dissipation

Note: See IUM for correct formula

Energy DissipationEnergy Dissipation

Dewatering NotesDewatering Notes Inspection and Maintenance NotesInspection and Maintenance Notes

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NPDES Signatory Requirements NPDES Signatory Requirements Looking BackLooking Back

Downstream end of diversion was Downstream end of diversion was constructed as a swale. Keeping it as constructed as a swale. Keeping it as confined channel all the way to the basin confined channel all the way to the basin may have worked bettermay have worked bettermay have worked better.may have worked better.

Stockpile location shown on plansStockpile location shown on plans

Questions??Questions??