Poinsettia, Voorhees, and Pacific Sewer Lift Stations Upgrade

Manhattan Beach, CA

PACE completed feasibility studies and concept plans and is currently designing upgrades to three sewer force mains and three sewer lift stations for the City of Manhattan Beach, including Pacific Avenue Wastewater Pump Station (WWPS), Poinsettia Avenue WWPS, and Voorhees WWPS. These lift stations and force mains were originally constructed in the early 1960s, with mechanical and electrical upgrades implemented around the mid-1990s, and the facilities are now approaching the end of their useful lives. The City is concerned with the reliability of these aging systems, further exacerbated by frequent power outages. PACE determined that, as an alternative to improving the Pacific Avenue WWPS, the station could be replaced with 800 linear feet of 12-inch gravity pipe. Upgrades at the Voorhees WWPS include approximately 1,200 linear feet of 6-inch force main, and the Poinsettia Avenue WWPS will be upgraded with 120 linear feet of 4-inch force main and 80 linear feet of 8-inch gravity pipe. All three lift stations are located in sensitive areas, including in front of or adjacent to homes and in a driveway to a local church.

Key Features:

• Site and existing assessment and improvement plan
• Solutions developed to avoid additional above-grade equipment or aesthetic impact
• Sewer pipe replacement (including slip-lining)
• Upgrades or replacements of mechanical and electrical pump station components
• Phased construction to avoid the need to operate a separate temporary bypass system during construction
• Generator installations
• Maintaining existing force mains as redundant force mains
• Construction cost estimating