Transcription of BMP #: Dry Wells / French Drains - B.F. Environmental
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BMP #: Dry Wells / French Drains - B.F. Environmental
Structural BMP Criteria BMP #: Dry Wells / French Drains A Dry well , or French Drain, is a variation on an Infiltration Trench that is designed to temporarily stores and infiltrate rooftop runoff. Key Design Elements Potential Applications ! Maintain minimum distance from building founda- Residential Subdivision: YES. tion (typically 10 feet) Commercial: YES. Ultra Urban: YES. Industrial: LIMITED. ! Provide adequate overflow outlet for large storms Retrofit: YES. Highway/Road: NO. ! Size to retain and infiltrate the difference in runoff volume for the 2-year storm, pre- to post- develop- ment Stormwater Functions ! Depth of Dry well aggregate should be between Volume Reduction: Medium 18 and 48 inches deep Recharge: Medium Peak Rate Control: Medium Water Quality: Medium !
Pennsylvania Stormwater Management Manual 1 Section 5 - Structural BMPs Structural BMP Criteria BMP #: Dry Wells / French Drains A Dry Well, or French Drain, is a
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