The Daguerre Point Diversion Dam is a submerged dam on the Yuba River, slightly downstream from Browns Valley and Hammonton but upstream from Marigold. It is 24 feet high and is owned by the U.S. Army Corps of Engineers. The dam is not intended to obstruct the flow of water, but rather to prevent debris from hydraulic mining from washing into the Feather River and Sacramento River. It also provides hydraulic head for upstream diversions, making the area immediately upstream of it the primary diversion point for water to enter irrigation canals on both the north and south banks. Due to being completely submerged, it can be hazardous to unsuspecting boaters.
The Daguerre Point Dam was built in 1906 and rebuilt in 1964 due to flood damage. In 1937, it was equipped with two fish ladders, one on each side of the dam, to help fish swim past it. Under certain flow conditions, Chinook salmon and steelhead have trouble navigating the fish ladders.
There are fish ladders on both sides of the dam to help spawning salmon on their journey up the Yuba.
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California Department of Water Resources: Fish Passage Improvement Program: Daguerre Point Diversion Dam
