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SFPUC Biosolids

Design-Build for SFPUC Biosolids Digester Facilities Project San Francisco Public Utilities Commission (SFPUC) is a department of the city that provides drinking water and wastewater services to San Francisco along with, green hydroelectric and solar power to San Francisco municipal…

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Second Narrows Tunnel

Metro Vancouver is constructing the Second Narrows Tunnel which will act as a new water supply under Burrard Inlet, east of the Ironworkers Memorial Bridge in British Columbia. This project is one of five new regional water supply tunnels that…

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Silicon Valley Gravity Pipeline

With the significant population growth in the San Francisco Bay area, the Silicon Valley Clean Water’s (SVCW’s) wastewater conveyance authority that serves more than 200,000 customers sought replacements for their aging and increasingly unreliable system. One part of SVCW’s Regional…

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Block 185

Block 185 is a 37 floor building with 6 basement floors below ground surface which is below groundwater, the project is within 300 feet from the Colorado river which requires a support of excavation that acts as cutoff wall.  Malcolm…

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Santa Ana Bridge

Malcolm's first hydrocutter project in California was the Santa Ana Bridge in Corona. Slurry concrete diaphragm walls were installed for scour protection of the BNSF Railroad Bridge piers and abutments, just downstream of the Prado Dam. The walls surrounding the…

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W.A.T.R. Facility

Malcolm's first diaphragm wall ("D-Wall") project in Oregon was for a pump station and associated water treatment plant in Hillsboro. A diaphragm wall is a reinforced concrete wall, excavated under bentonite slurry. This wall was part of Malcolm's innovative, value…

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Wet Weather Equalization Basin

A Wet Weather Equalization (EQ) Basin was constructed in the city of Pacifica to mitigate storm-related sanitary sewer overflows. Malcolm installed a diaphragm wall 500 feet from Pacifica State Beach, for the 2.1-million-gallon-capacity basin that is used to temporarily store…

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50 Calle

A commercial development at 50 Calle included construction of a four-level underground parking garage. Malcolm designed and constructed the diaphragm wall, optimizing the design to enable the wall to perform the dual function of being a temporary retaining wall for…

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