The objective of Roseville’s Aquifer Storage and Recovery (ASR) Program is to store surplus drinking water (10,000 acre-feet per year) in the underlying aquifer during periods of normal and above normal precipitation. This stored drinking water is then extracted and served to meet peak demands. West Yost provided design and construction management services for two ASR wells for the City.
West Yost provided planning, design, and construction management for the Ophir Road Pump Station. This pump station constructed about a mile upstream and 210 feet above the Auburn Tunnel outlet, allows Placer County Water Agency (PCWA) to pump water from the tunnel for municipal and agricultural use. It is designed to pump 332 cfs of water through three distinct pump stations, housing 11 vertical turbine pumps ranging in size from 200- to 600-hp.
West Yost designed the relocation, replacement, and/or rehabilitation of existing sewers in the City’s downtown residential area to address structural deficiencies, maintenance issues, and system reliability. The existing sewers were installed nearly 100 years ago and could not be cleaned or maintained due to pipe fragility and lack of access. The challenges of replacing these backyard sewers included access, public outreach, homeowner coordination, design approach, and construction methods for rerouting sewer laterals.
West Yost designed and provided construction management for the System 9 project on a fast-track schedule. This $14 million project used a design-build contract approach for construction and retained West Yost in the role of the City’s representative for construction management and inspection services.
West Yost provided construction management (CM) improvements to the pump station, which included replacing the existing tank in the hydropneumatic surge arrestor system with a 1,500-gallon tank. West Yost oversaw the replacement of the existing air compressor with a new 5-hp compressor, installation of three variable-frequency drives on the existing pump motors and installation of a flow meter in the vault box. The West Yost CM team also coordinated with local utility owners, including PG&E, and obtained permits and complied with agency permit requirements.
West Yost provided the predesign, design, and construction management and inspection for a partially buried, 3 MG potable water concrete storage tank and a 6,000 gpm booster pump station located in the City’s David Douglass Park.
West Yost provided planning, design, and construction management (CM) services for the Linne Road Reservoir and Pump Station project. The project consists of construction of a 7.2 MG, buried, prestressed concrete reservoir, a 21 mgd booster pump station, and installation of approximately two miles of 24-inch transmission main.
The facilities are located within a park site adjacent to a baseball field.The tank is buried and covered with tennis courts. West Yost’s services included preparation of a feasibility report that evaluated alternative site configurations, hydraulic modeling, design, and services during construction.
West Yost provided engineering design and construction management services for a 2,100 gpm pump station (10A), 300 feet of 8-inch pipeline and approximately 1,500 feet of 20-inch pipeline, seismic improvements to a partially-buried 3 MG reservoir (10A), and water distribution system interconnections.
West Yost is providing construction management for construction of a new cast-in-place concrete structure adjacent to the existing headworks while keeping the existing headworks operational.
West Yost provided construction management and inspection services on the Auburn Tunnel Plug Removal Project. The work included blasting, hazardous waste removal and steel demolition, with safety being one of the most critical aspects of the project. Event though the project experienced some unforeseen challenges with lead based paint and leaking hydraulic oil, the project was completed on time and under budget.
West Yost provided construction management (CM) and inspection services for the $7 million College Park Water Storage Tanks and Booster Pump Station project. The project included two 3.7 MG prestressed concrete water storage tanks and a combined booster pump station that serves the two different pressure zones (7.9 mgd and 4.3 mgd) on an approximate 2.3-acre site for this growing new community.
West Yost provided design and construction management services to expand the existing 14-Mile Slough Pump Station (14-MSPS) by nearly 700%. This project represents one of the largest trench-style wetwell pump stations in California. The award-winning pump station upgrade increased reliable pumping capacity from 3.75 mgd to 14 mgd, and with a buildout capacity of 22.5 mgd.
West Yost provided hydraulic analysis, predesign, design, and construction management and inspection for the award-winning, Stoneridge Water Storage Facility. The project consists of a 2.9 MG prestressed concrete, partially buried, tank and associated inlet/outlet piping, control valves, drains, and site improvements.
West Yost assisted the City with a design-build for a $14 million project to extend sewer lines to an undeveloped area in northeast Stockton. West Yost served as the City’s representative to complete 30 percent design, right of way acquisition, design build team procurement, and construction management services. Construction management services included all contract administration, full-time onsite construction monitoring, and all closeout activities.
