C+S December 2023 Vol. 9 Issue 12 (web)

the stress of a highly urbanized environment. The Project includes the following improvements: establishment of landscapes around the subsurface storage system, restoration of the baseball field, restoration of the existing irrigation system, replacement and restoration of light poles and electrical conduit, and restoration of streets and sidewalks. The Project enhances the community's quality of life by encouraging recreational activities that help maintain a healthy community. Technical Aspects • Diversion and pre-treatment of runoff from three local storm drains into a subsurface storage system for infiltration • Subsurface storage system footprint of 15.6 addition acre-feet, resulting in a single-storm capture volume of 25-acre feet • Pretreated flows conveyed through a gate valve

Background The City of San Fernando (City) is implementing the San Fernando Regional Park Infiltration Project (Project). The Project was identified in the Upper Los Angeles River (ULAR) Enhanced Watershed Management Program (EWMP) Plan as a priority regional project and will assist the ULAR group in addressing applicable Total Maximum Daily Loads (TMDLs) and water quality priorities. The primary goals of the Project were to improve water quality while providing multiple benefits. The Project will divert and capture wet- and dry- weather runoff from over 940 acres, effectively reducing pollutant loads that would otherwise enter Pacoima Wash and the Los Angeles River. The captured runoff will be pretreated and then discharged into a subsurface storage system that will facilitate infiltration at the San Fernando Regional Park, resulting in groundwater recharge. In addition to recharge and water quality benefits, the Project will have additional benefits including flood control benefits and public outreach benefits (outreach events and permanent signage). Impact The 9.5-acre park includes the San Fernando Regional Pool and Community Center, a children’s play area, and athletic fields. Surrounded by urban development, the park is bound by a Metropolitan Transit Authority (MTA) railway to the west along First Street, industrial parks on the south and east corners, and medium-density housing to the north on Park Avenue. The Project ensures continued use of San Fernando Recreation Park by the DAC seeking respite from

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December 2023

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