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.
Independence Lake Log Cribwall and Fish Barrier Design
Client: 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.