Project Name :
Simon Bolivar Park, Lakewood, CA
Tetra Tech Civil Engineers
About Project :
The City of Lakewood receives stormwater runoff from over 3,000 acres of watershed that is lost to the ocean in an area of the country that is in a severe drought. The stormwater culvert run alongside Simon Bolivar Park that irrigates almost 400,000 – square feet of turf and other landscaping. The city was interested in managing the stormwater and using a portion of captured stormwater for irrigation.
System Type :
Stormwater for Irrigation
Commissioning Date :
While Wahaso has designed and delivered many systems that harvest stormwater for irrigation, other projects collected from controlled watersheds – normally the roof and hardscapes of a commercial site. The Lakewood project was problematic because the 3,000 acres are not controlled, meaning that there was the potential for hydrocarbons and other harmful chemical run-off.
The system strategy was to over-engineer the system to remove as many contaminants as possible, and to include several dynamic water quality measurement devices to detect harmful levels of hydrocarbons or system fouling. These included hydrocarbon sensors, turbidity meters and PH monitoring. An activated charcoal filtration step was added to the treatment train to remove metals and help clarify the water. The control system was designed to report constantly to the Lakewood City automation system, and control logic was written to immediately bypass any water outside of acceptable quality ranges. See a video on the project here.
The system was commissioned in April, 2018 and helps manage tens of millions of gallons of stormwater annually. Water quality tests confirmed that the system output is clean, clear and free of any harmful pathogens, making it safe for spray irrigation. The irrigation component should save the community over four million gallons of municipal water annually. A similar project is in the works for Mayfair park in the city.