The North Yakima Conservation District (NYCD) and the Mid-Columbia Fish and Wildlife Conservation Office (MCFWCO) propose to develop a preliminary design to improve fish passage and provide protection from entrainment for Mid Columbia steelhead on Snake Creek, which is a side channel of Toppenish Creek. The diversion consists of a rock diversion dam that diverts water down a fork of Snake Creek, approximately 940 ft. before it rejoins Toppenish Creek. The rock diversion dam creates a fish passage barrier to adult and juvenile steelhead migration at various flows within Snake and Toppenish Creeks. The diversion of Snake Creek serves primarily as an irrigation source for agricultural land use practices with several other irrigation take outs down the ditch. The project will use desktop and field investigations to produce conceptual design alternatives aimed at providing fish passage in Snake Creek for all life stages of steelhead and native fish at all periods of the hydrograph, screen the diversion to prevent entrainment and maintain the trajectory of out-migrating juvenile steelhead into Toppenish Creek. A preferred alternative will be chosen and developed into a more detailed preliminary design.