Shasta Dam
Temperature Control Device
Shasta, California
Somerset Engineering Group provided construction engineering services to develop the erection scheme for this $80 million Bureau of Reclamation project designed to regulate water temperature for fish spawning.
 The steel structure, which weighed over 8,000 tons and is equivalent to building a 28-story building under water, was installed upstream of the Shasta Dam. It releases water at three levels, to a maximum depth of 350 feet, so that the water temperature is suitable for fish spawning downstream.
Somerset designed and detailed large temporary steel frames attached to the dam concrete to suspend the permanent towers.
Using jacks and rods for lowering, the permanent towers were suspended between the temporary frames and built sequentially.
Each tower weighed as much as 1200 tons. Once lowered in place, divers attached the towers to the dam.
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