Woodside Infiltration Chamber Project
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Scotts Valley Woodside Infiltration Chamber

Woodside 02Location: Scotts Valley, CA

Project Description: The Woodside housing and retail development is located at 5015 Scotts Valley Drive, Scotts Valley, in the Carbonero Creek/San Lorenzo River Watershed and the Santa Margarita Groundwater Basin. Sited on 16.5 acre former sand quarry site, the project utilizes a unique system that captures run-off from parking lots and roofs instead of sending it to storm drains. It's one of five improvements proposed to reduce stormwater volumes, improve water quality (through reduction of nutrients, pathogens and sediment) and recharge groundwater- the sole source of drinking water for the Scotts Valley area. This project is in a primary groundwater recharge area for Santa Cruz County and supports aquifer recovery, being expected to capture at least 12 AFY of stormwater for infiltration, with an expected high yield of 24 AFY. Scotts Valley Water District (SVWD) has started to monitor water levels within infiltration basins and galleries, with positive results.

Large polyethylene cubes were stacked and wrapped with filter fabric and buried under two sealed asphalt parking lots. Bio swales (vegetated filter strips) located throughout the development slow, sink and spread the water en route to these two large infiltration galleries. The swales are layered with filter fabric, drain rock, sand, topsoil and plants at the surface to improve infiltration. The development also utilizes recycled water for irrigation, to make it an “aquifer-friendly” development.

 

Designs: Underwood & Rosenblum

Installation: Sanco Pipeline Inc. and St. Thomas Construction

Funding: The Woodside project developer and in-kind match from the Scotts Valley Water District. This project will be credited toward the match requirements for the other projects being installed at part of the Proposition 84 Stormwater Grant funds.

Permits: Initial Study (I/S) and Environmental Impact Report (EIR), City of Scotts Valley Building and Grading Permits, CEQA and NPDES.

Additional Images:

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