Sterling Construction says that its subsidiary Road and Highway Builders has been awarded a $135 million heavy civil contract by the City of Los Angeles for the construction of the North Haiwee Dam No. 2 (NHD2) in Inyo County.
The project consists of mining and processing one million cubic yards of material for the multiple zoned embankment dam. Since no bedrock is present at the site, Sterling will drill more than 13,000 individual cement, deep-soil shafts for the dam footing. Each individual shaft is from 40 to 60 feet in length and 5 feet in diameter.
The project will also involve the rerouting of the Los Angeles Aqueduct, which supplies clean drinking water to the city of Los Angeles, to allow for the appropriate tie-ins for the dam construction.
The project will begin in May 2021 and will take approximately four and a half years to complete.