Project Details Location Humboldt, CA Humboldt Bay Power Plant (HBPP), a Pacific Gas and Electric Company (PG&E), began decommissioning and demolishing its Unit 3 nuclear power plant. The decommissioning of HBPP required the removal of sub grade structures, which will require excavation below the water table. This required that the excavations be pumped to maintain …
Project Details Location Sonora, CA Caltrans contracted with Tiechert to build a bypass on Highway 108 in Sonora CA. Under CA General Stormwater Permit, storm water was required to be discharged to a nearby creek. Initial attempts to provide erosion control by standard BMPs proved ineffective to meet discharge requirements. Treatment Clear Creek mobilized a …
Project Details Client Kiewit Corporation Location Pacifica, CA Devil’s Slide Tunnels were designed by California Department of Transportation (Caltrans) to re-route existing Highway 1 traffic around an unstable geologic formation called Devil’s Slide. Two 28′ diameter tunnels approximately 1 mile long with 10 cross passages were constructed. During excavation, groundwater and process drilling water was …
Project Details Client William Charles Construction Location Rockford, IL A large power supplier undertook the site remediation of a 14-acre legacy property in Northern Illinois, formerly a manufactured gas plant from the late 19th century through 1947. Above ground structures were demolished and removed. The site had a variety of contaminants in the soil and …
Project Details Location San Francisco, CA Mountain Lake, part of San Francisco’s Golden Gate National Park, was contaminated from highway storm water runoff over the last few decades. The dredge contractor for the project elected to use a suction dredge and dewatering bags to remove the contaminated sediments. The heavy sediments were removed using bags …
Project Details Client Schiavone Construction Location Wappingers Falls, NY Water leakage from the RWBT at Roseton, NY will be remediated by constructing a new bypass tunnel between two new shafts, one near existing Shaft 6 to the east of the Hudson River and the other adjacent to Route 9W, to the west of the Hudson …
Project Details Client R&L Brossamer Location San Francisco, CA In San Francisco, R&L Brossamer was contracted to construct the Doyle Drive realignment using a cut and cover tunnel approach and demolition of an existing elevated roadway for Caltrans. Dust concerns during demolition necessitated large amounts of dust control water to be used in addition to …
Project Details Client A Metal Recycling Facility Location Seattle, WA A local metal recycling facility was concerned about potential recontamination of a cleanup area on the Duwamish River and opted to lower their risk horizon by implementing a stormwater runoff treatment system. Clear Creek worked with the facility’s consultant and engineer to develop a water …
Project Details Location Washington State The sand and gravel industry serves as a major supplier of aggregate, concrete and asphalt which supports the construction and maintenance of the nation’s civil infrastructure. The facility implemented a basic filtration system for treatment of stormwater runoff in 2002 however changes in permit requirements required the facility to consider …
