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When completed in 1941, this was the tallest double-deck bridge in the world at 500 feet high. One deck carried the Southern Pacific Railroad's Shasta Route train (which had formerly traced its path across the floor of the Pit River Valley), while the other served automobile traffic on US Interstate 5. It was a Warren deck truss design,3,588 feet long, with 8 spans (the largest of the spans being 630 feet) and 7 piers. The dam was built to span Lake Shasta, a reservoir created by the US Reclamation Service's construction of the Shasta Dam between 1937-1945.

PCAD id: 16966