City of Los Angeles Garvanza Park Rainwater Capture and Use Construction Management

Garvanza Park was retrofitted to enhance the water quality of runoff from an 85-acre watershed. This project involved the design and construction of a drainage system to reroute urban and stormwater runoff from an existing 48-inch reinforced concrete storm drain pipe into a pretreatment Best Management Practice (BMP) system consisting of a hydrodynamic separator and settling basin, and two subsurface detention-infiltration galleries for onsite infiltration and landscape irrigation use. This award-winning project provides many important benefits to the drought-stricken region, including: water conservation; stormwater management technology advancement; compliance with State and Federal laws, regulations, and policies; retention, treatment, infiltration, and use of up to one-million gallons of runoff per storm event; and a 90% annual pollutant load reduction for the affected area.


CWE provided construction management and inspection services, including scheduling, record management, site coordination, change orders, communication with the contractor, preparation of progress reports, construction contract administration, supervision and field inspections, and labor violation report preparation.