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Environmental Services
Dean Messer, Chief
3500 Industrial Blvd.
West Sacramento, CA 95691
(916) 376-9699
Mailing Address:
P.O. Box 942836
Sacramento, CA 94236-0001
Completed Projects: Tuolumne River Gravel Augmentation
Tuolumne River - Gravel Augmentation Background The project site is located near the town of La Grange between RM 50 and 51. The lower portions of the Tuolumne River, like other regulated rivers in the San Joaquin system, have been deprived of coarse sediment. Since the construction of La Grange Dam in 1893, coarse sediment supply from the upper Tuolumne River watershed is no longer supplied to the lower reaches of the river. This causes bed degradation, bed coarsening, and loss of alluvial deposits which negatively impacts salmon production by reducing quantity and quality of spawning and rearing habitat. The purpose of this project is to augment the coarse sediment supply to the lower Tuolumne River with clean, graded gravel that is intended to mimic the natural process of coarse sediment supply transport. The California Department of Fish and Game is the primary partner for the implementation of this project with monitoring performed by DWR staff.
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