Arroyo Seco Urban Water Quality Improvement Projects

Arroyo Seco Urban Water Quality Improvement Projects: #1 – Sycamore Grove Park (AS-15) and #2 – Hermon Dog Park (AS-21)

The AS-15 Dry Weather Diversion (DWD) system is located adjacent to Sycamore Grove Park at the southeast corner of N Figueroa St and S Avenue 49. The DWD will divert maximum dry weather flow of 0.32 cfs from a City-owned 9 ft x 9 ft box culvert storm drain which runs perpendicular to the Arroyo Seco Parkway. Flow will enter the 42-inch sanitary sewer located at the Sycamore Grove Park access road.

The AS-21 DWD system is located at Hermon Dog Park north of Via Marisol Street and south of Monterey Road. This DWD will divert a maximum dry-weather flow of 0.03 cfs from a City-owned 24-inch diameter storm drain and a 30-inch diameter storm drain which run through Hermon Dog Park to an 18-inch sewer line in Via Marisol.