The days of sending stormwater off site to be conveyed to the nearest receiving water are long gone. Today, we can use the principles of LID to manage stormwater as a resource, which provides flood control, prevents downstream flooding, improves water quality, and promotes groundwater recharge. In an effort to demonstrate the proper way to design and implement LID measures, a number of Southern California Agencies have decided to create campuses to be used for “show and tell”. Riverside County was one of the first to build its own LID Testing and Demonstration Facility, which was completed in 2011 at a cost of $2.5 million. View more information here.
In similar fashion, Orange County has set aside over $2.6 million to retrofit their Glassell Campus with a number of LID measures that people will be able to see and touch by the end of 2016. The 9.4 acre Glassell Campus, which is owned by OC Public Works, was subdivided into 17 distinct drainage areas intended to be managed independently. In accordance with typical engineering design standards, the proposed best management practices (BMPs) were designed to treat the runoff generated by the 85 percentile rainfall event.
The BMPs selected for the campus include:
~ Rain Barrel ~ Permeable Paving
~ Bioswale ~ Underground Cistern
~ Flow-through Planter ~ Media Filter Planter Box
~ Modular Wetland ~ MaxWell® Drywell
Based on multi-year monitoring results from prior years, runoff from the Glassell Site contains elevated levels of heavy metals, oil and grease, suspended solids, nutrients, and bacteria…all typical of a commercial-industrial land use. In order to achieve the required 95% load reduction for pollutants such as bacteria, nutrients, metals, and suspended solids, the site conditions within each of the 17 drainage areas was carefully considered. Once evaluated, a minimum of two BMPs selected from the list above was designed for each of the drainage areas.
Upon completion, the Campus will be outfitted with informational/directional signage and OC Staff will provide project literature and Campus tours in accordance with the public education and outreach requirements of the Proposition 84 Grant. Additional project information can be found HERE.
DRYWELLS WILL IMPROVE YOUR PROJECT’S CAPACITY FOR AQUIFER RECHARGE.
TO LEARN HOW, CONTACT US TODAY.