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BMP Monitoring Sites - Urban Drainage and Flood Control District

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UDFCD <strong>BMP</strong> MONITORING SITES<br />

Open Bed S<strong>and</strong> Filter<br />

The WQCV basin may be oversized to contain the<br />

EURV, in which case design the orifice outlet to drain the<br />

EURV in 72 hours <strong>and</strong> control the 100-year volume as<br />

described in the Manual.<br />

Inlet Works<br />

Provide an energy dissipating outlet for all inlet<br />

points into the s<strong>and</strong> filter. Use an impact basin for pipes<br />

<strong>and</strong> a baffle chute or grouted sloping boulder drop if a<br />

channel or swale is used. Install a Type VL or L riprap<br />

basin at the inlet over a geotextile fabric that is wrapped<br />

up on the sides to the top of the s<strong>and</strong> layer. Fill all rock<br />

voids with filter s<strong>and</strong>.

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