Protection Measures Selection Tool

Dam removal projects shall: 1) have a relatively small volume of sediment available for release, that when released by storm flows, will have minimal effects on downstream habitat, or 2) be designed to remove sediment trapped by the dam down to the elevation of the target thalweg including design channel and floodplain dimensions. This can be accomplished by estimating the natural thalweg using an adequate longitudinal profile (see CDFW Manual Part XII Fish Passage Design and Implementation) and designing a natural shaped channel that provides the same hydraulic conditions and habitat for steelhead as the natural channel and that has the capacity to accommodate flows up to a 2-year flood.