Presentation to SWCD staff.

1. Project Background
Case Study of a
227 acre parcel in north central Kane
Successful 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.) Aerial
Three Planned Creek Crossings—Two
Crossings—
Permanent, One Temporary
One Drainageway Permanently Impacted
Obtained Corps of Engineers Permit which
requires SWCD review and i
i i d inspection of S il
ti f Soil
Erosion and Sediment Control
Article 3-Erosion and Sediment Control-of the
3- Control-
Kane County Stormwater Ordinance is
administered by the City
NPDES Permit Coverage
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2. Topography Map Water Features
Soil Erosion and
Sediment Control Plan
Total of 7 Sheets
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3. SWCD Standard Notes
Key Components
y p
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4. Legend of Practices Scheduling Information
Perimeter Silt Fence Stabilization Information
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5. Stockpile Stabilization and
Stabilization
Protection
Early 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
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6. Diversion of Offsite Flow/Runoff Sediment Traps/Basins
Erosion Control Blanket Location Protection of Detention Basins
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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
meeting
Drawings for Temporary Practices Drawings for Permanent Practices
Note: See IUM for
correct formula
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8. Stabilized Entrances Clean Streets
Inlet Protection Check Dams
Not Recommended.
Other practices/products available.
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9. Energy Dissipation Energy Dissipation
Note: See IUM for
correct formula
Dewatering Notes Inspection and Maintenance Notes
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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??
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