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On -Call Engineering Services BOLIVAR PARK STORMWATER CAPTURE, Lakewood, CA Tetra Tech was contracted by the City of Lakewood to evaluate two potential site locations for the development of the Lakewood Stormwater and Runoff Capture Project: Mayfair Park site and the Bolivar Park site. Tetra Tech provided a Project Engineering Study Report (PESR) that represented 10% design completion level and described the evaluation of the two sites with all site investigation, hydrology and hydraulic, and water quality data and analyses to provide a recommendation for site selection. The Bolivar Park project consisted of an air -inflated rubber dam diversion system to redirect all urban runoff and stormwater runoff from the Del Amo channel through a pre-treatment system to remove trash, debris, and sediment. A pump station and drainage pipeline will then convey the water into a large, buried multi -chambered storage/infiltration facility. The stormwater collected in the underground reservoir will be treated and used to irrigate the parWs landscaped areas. The system will monitor the weather conditions and the facility through a secured cloud -based system. The goal of the project was to not only help the City comply with the metals Total Maximum Daily Loads (TMDLs), as presented in the Los Cerritos Channel Watershed Management Program, but also provide additional benefits such as revitalized park infrastructure and augmentation of local water supplies. As one of the first cities to receive stormwater funding to support Caltrans with stormwater compliance units, the success of this project serves as a model for other agencies to follow. CULVER BOULEVARD CORRIDOR REALIGNMENT PROJECT AND STORMWATER FILTRATION AND RETENTION PROJECT, Culver City, CA Tetra Tech performed survey and civil engineering design services for two separate projects along Culver Boulevard, a median realignment project and a regional stormwater capture project. At the heart of the realignment project is a newly constructed 58-foot wide raised landscape median, complete with buffered bicycle and pedestrian paths to improve pedestrian and vehicular safety and mobility while mitigating traffic noise and nuisance impacts to nearby residents. Street improvements included the reconfiguration of existing traffic lanes, new and reconstructed landscape medians, traffic signal additions and modifications, newly designed bus stops, signal interconnects, new lighting, utility adjustments, relocation of existing catch basins, and the design of a parking lane with innovative buffer treatment to separate it from the eastbound high-speed travel lanes on Culver Boulevard. The regional stormwater capture project will maximize pollutant and stormwater capture by diverting dry and wet - weather stormwater flows at a rate of up to 50 cubic -feet -per -second from two stormwater facility locations. Diverted stormwater flows are first sent to one of two pretreatment units to remove trash and sediments and then to a concrete underground storage facility capable of providing up to 8-acre-feet of storage. Stored water is pumped to the post -storage filtration system where it is polished for final pollutant removal before being returned to downstream storm drain channels and receiving waters. As an added benefit of this project, treated stormwater will be used to offset potable water irrigation demands on the newly constructed 58-foot-wide raised landscape median and at nearby Veterans Park. NTETRA TECH