After West Yost performed a peer review for the design of the
Pleasant Hill-Grayson Creek Trunk Sewer, Central Contra Costa
Sanitary District selected West Yost to provide construction
management and inspection services for this $10 million project
for construction of approximately 10,000 feet of 18 to 24-inch
diameter trunk sewers. West Yost performed contract
administration and inspection in support of the District’s
Project Manager and Resident Engineer. More than half of the
project alignment was installed by trenchless methods consisting
of auger boring and pilot tube guided boring.
This $28 million recycled water pipeline project was constructed
to convey Title 22 recycled wastewater from the City of Turlock’s
outfall location at the San Joaquin River to the City of
Modesto’s effluent pump station location about 7-miles away.
Once completed Turlock’s recycled water will be pumped from
an existing pump station at the City of Modesto’s wastewater
plant to the Delta Mendota Canal, where the Del Puerto Water
District will extract the water to use for their agricultural
needs.
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.
