The City of Shasta Lake (formerly known as Central Valley) all started with the construction of Shasta Dam in 1938. Project City was built at the intersection of Highway 99 and Shasta Dam Boulevard, a larger Central Valley further down the road, and Summit City on Lake Blvd. The workers at Shasta Dam built these towns because provisions were running low and working conditions were getting harsher. Later on, Central Valley became the commercial hub of workers on Shasta Dam.