Facilities

Extensive experience in the construction of underground and above ground structures and facilities.  The below sample Projects exemplify the capabilities of MITCHELL ENGINEERING.

 

Projects and Information

BRIDGEHEAD EXPANSION - PHASE 2
Antioch, California visual lightbox for MACby VisualLightBox.com v5.7

Bridgehead Expansion – Phase 2

Antioch, California
Project consisted of the construction and modification of an 11.75 MGD wet/dry pit wastewater pump station, and of a 900 kW standby diesel generator facility housed in a concrete substructure enclosed in a CMU block wall and metal roof enclosure, and a 1.3 MG circular concrete emergency storage basin (ESB) tank.
Owner:  Delta Diablo Sanitation District
Contract Amount:  $11 million

ARDEN PARALLEL FORCE MAIN
Sacramento, California visual lightbox for MACby VisualLightBox.com v5.7

Arden Parallel Force Main

Sacramento, California
Project consisted of the installation of a 60-inch diameter force main pipeline along the American River near the Arden Pumping Station to a point near the Fairbairn WTP.  Work required the construction of two connection vault structures, one jacking and two receiving shafts, four access manways, two air release/vacuum valve vaults, a surge protection system comprised of 4 large tanks and a control building.
Owner:  Sacramento Regional County Sanitation District
Contract Amount:  $24 million (all inclusive)

CLARENDON PUMP STATION
San Francisco, California visual lightbox for MACby VisualLightBox.com v5.7

Clarendon Pump Station

San Francisco, California
Project consisted of the construction of a above-the-ground pumping station to provide emergency back up to the City’s water delivery system.  Work required includes the construction or installation of six centrifugal pumps (to provide water to two of the highest reservoirs in San Francisco), a state-of-the-art automated control center, a diesel engine generator with underground fuel tank storage for pumping during power outages and emergencies, electrical switchgear and station control panels, and new water main ductile iron and steel pipes.
Owner:  San Francisco Public Utilities Commission
Contract Amount:  $8.4 million

WET WEATHER PROGRAM - PHASE 1
South San Francisco, California visual lightbox for MACby VisualLightBox.com v5.7

Wet Weather Program – Phase 1

South San Francisco, California
Wet Weather Program primarily consists of the following work:
Owner:  City of South San Francisco
Contract Amount:  $22 million

1) Upgrade to San Mateo Pump Station.-  Demolition of the existing San Mateo Pump Station Building and all interior concrete of the existing Wet Well; construction of an intake structure consisting of 42-inch gravity mains and ultrasonic transit time flow metering structure; installation of four new submersible pumps ranging in size from 100HP to 280HP with all associated diversion structures, utility duct banks, telemetry, controls and electrical work; installation of a 480v, 750kw diesel engine driven generator with all devices and equipment required for the operation of the pump station.
2) New Shaw Road Pump Station.-  Construction of new pump station 25 feet below ground; construction of an intake structure consisting of 60-inch gravity mains and ultrasonic transit time flow metering structure; installation of six new submersible pumps ranging in size from 45HP to 120HP with all associated diversion structures, utility duct banks, telemetry, controls and electrical work; installation of  a 480v, 400kw diesel engine driven generator set with all devices and equipment required for the operation of the pump station.
3) New Effluent Storage Pond and Pump Station.-  Construction of a new pump station 20 feet below ground; construction or installation of five new vertical turbine pumps with all associated diversion structures, utility duct banks, controls and electrical work; reconstruction and enlargement of an existing storage pond.

SUMMIT RESERVOIR
San Francisco, California visual lightbox for MACby VisualLightBox.com v5.7

Summit Reservoir Seismic Retrofit and Improvements

San Francisco, California
Project consisted of the seismic retrofit and necessary improvements, to meet current seismic and health codes, to the two basins perched atop Twin Peaks at the Summit Reservoir in San Francisco.  Construction included a new 16″ inlet pipe connecting an existing water main to the basins; new drilled piers and pier caps; perimeter and shear walls and foundations; the resurfacing existing concrete lined surfaces; and a new inlet valve vault with associated valves, piping, and flowmeters.
Owner: San Francisco Public Utilities Commission
Contract Amount:  $7.7 million