Las Lomas Pump Station Improvements Reaching Construction

California American Water 

Our goal for this latest project with California American Water (CAW) is the replacement and relocation of the Las Lomas Booster Pump Station. Our team has familiarity with the CAWs booster pump station after completing several in the past few years. Additionally, the location of the Las Lomas was very interesting for our team. The booster pump station serves the Los Angeles District and the Vineyard Reservoir Gradient (900-foot hydraulic gradient line) within the Duarte system. Our team was responsible for the design of this new station that is now heading into construction.

The existing Las Lomas Booster Pump Station was at the end of its service life and showed signs of major corrosion on the mechanical equipment. In the Condition Based Assessment (CBA) from the 2019 Comprehensive Planning Study, it was also explained that the pump station was undersized and would need to be able to match the Vineyard Booster Pump Station capacity. The Las Lomas Booster Pump Station is currently equipped with three identical 300 gpm, 25-HP vertical in-line centrifugal pumps. The Vineyard Booster Pump Station was upgraded with a pumping capacity of 1,950 gpm. The size restriction of the Las Lomas Pump Station site prompted the need for relocation. Our design will be equipped with three identical 650 gpm pumps and motors at 50 HP each including associated valves, piping, and instrumentation. The proposed new location in Duarte also requires approximately 1,200 linear feet of new 10-inch pipeline to be installed. Additionally, our team created a prepared a basis of design report, calculations for energy savings, construction sequence planning, permitting, construction plans, specifications, and cost estimates (PS&E) packaged to be ready for bidding and bidding construction support services.

David Song, PE, Project Manager, has led this project with C. Shem Hawes, PE, serving as project principal. David has been assisted by Heber Torres, PE, Electrical Engineer, Julie Padilla, Electrical Design, Sanjay Verma, PE, Project Engineer, Alexander Mairena, EIT, Staff Engineer, and Chris Duncan, PE, Survey Manager.