WATER/WASTE WATER

Location: Whittier, CA

Owner: U.S. Army Corps of Engineers

Description: The work is located at the Whittier Narrows Dam Spillway in Pico Rivera, California; specifically, near the existing utility galleries located at Station 115+42 (West Gallery) and Station 126+60 (East Gallery) along the dam axis. 

The Station 115+42 work includes the following:

• Construction of a temporary access ramp and temporary bypass the City of Whitter waterline
• Relocation of the City of Whittier waterline
• Installation of a filter diaphragm and filter blanket
• Structural modification to the utility gallery access chamber
• Removal of the temporary waterline bypass. 

The Station 126+60 work includes:

• Installation of temporary bypasses for the Suburban Water System (SWS) waterline and Los Angeles County Sanitation District (LACSD) sanitary sewer line
• Demolition of the SWS chlorine facility, flow meter and metering vault
• Relocation of the SWS waterline, LACSD sanitary sewer line and the dam toe drain
• Restoration of Relief Well (RW 137); replace existing 6” VCP lateral collector pipe
• Installation of filter diaphragm and filter blanket
• Structural modifications to the utility gallery access chamber
• Removal of temporary waterline and sewer line bypasses.