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BIORETENTION IN RIVERWOODS

An RPC Project Proposal

November 16, 2010

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BIORETENTIONBIOSWALESRAIN GARDENS ETC…….

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Bioretention

• Treatment of stormwater – Ground depression– Conditioned soil bed– Plant Materials

• Objectives– Stormwater runoff management– Hydrology restoration– Pollutant reduction– Aesthetic variation and native plant restoration

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Design Considerations

• Drawdown within 24-48 hours• 1-3 ft above Groundwater• Underlying Infiltration Rates• Soil Augmentation• Underdrain• Pollutant Hotspots

(Source: Baxter Woodman)

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RPC Role

• Act as a focal point and champion bioretention within the Village

• Build upon the Village’s initial rain garden efforts

• If proven appropriate, help define and support…– a Village policy and support program– property owner education

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Bioretention Project - Phase 1

• Demonstration cells (4)• Permissions and cooperation• Requirements and costs• Measurements• Grant availability, corporate support?• Implementation plan

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Bioretention Project - Phase 2

• Obtain volunteer and financial assistance• Develop the four sites• Conduct the evaluation• Propose policies and programs

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Current Requests

• Continue to endorse bioretention• Confirm the RPC role• Acknowledge the project plan• Cooperation:

– Easements– Resident communication– Etc.

• Volunteer!