SFPUC Biosolids
As a result of the proximity of the active railroad lines, the 200,000 square feet support of excavation (SOE) wall for building 610 had to also act as a cutoff wall reaching a depth of 160-feet to key in the…
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…
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…
Santa Ana Bridge
Slurry Concrete Diaphragm Walls help improve key Infrastructures The Santa Ana River is designed to improve the scour protection of the BNSF Railway Bridge foundations during large discharges of the Prado Dam, which is one mile upstream from the project…
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…
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…
