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Independence Lake Log Cribwall and Fish Barrier Design

20120718 141722.webClient: The Nature Conservancy

Independence Lake holds one of only two known wild, self-sustaining populations of Lahontan cutthroat trout in the world - a species that has been lost from 99% of its historic range.  Waterways staff are proud to have assisted The Nature Conservancy in their efforts to protect and restore this critical habitat through the planning and design of a barrier to exclude non-native fish from the lake. 

The selected barrier design takes advantage of an existing artificially steepened reach of channel at the outlet of the lake to achieve a hydraulic geometry that will prohibit fish passage.  The design includes a channel and floodplain spanning concrete “dam” and energy dissipation pool that will safely pass design floods without inducing excessive erosion or backwatering of the upstream reservoir controls.