Mid Columbia Fisheries developed conceptual designs to activate a historic side channel to the Teanaway River, install large wood on the main channel, and restore floodplain function of two tributaries in and along 0.5 miles of the mainstem Teanaway River, a tributary to the Yakima River in Kittitas Co. The project included nearby landowner outreach, alternative development, flood modeling, benefits and risk evaluation, and restoration alternative selection. Once constructed, the project will benefit ESA-listed Mid-Columbia steelhead, spring Chinook, bull trout, and resident trout. The project area is primarily a WDFW property at river mile 8 acquired for conservation in 2017. The mainstem Teanaway river is impaired by low summer flows and high water temperatures. Historic uses have resulted in a simplified channel and poor channel substrate conditions for spawning, incubation, and larval development. Riparian forests have been removed or heavily altered reducing shade, raising temperatures and reducing large wood loading. Off-channel habitat, such as side channels and unobstructed tributaries, are key areas for rearing spring Chinook, steelhead and bull trout and valuable for all life stages of resident fish, but are now uncommon on the mainstem river. Over one-third of steelhead returning to the Upper Yakima basin return to the Teanaway watershed, passing through the mainstem Teanaway River to upper tributaries.