The Yakama Nation has actively managed fish and wildlife on their Tribal lands for over 50 years. During this time, wild and artificially produced spring Chinook (Oncorhynchus tshawytscha), fall Chinook (O. tshawytscha), coho (O. kisutch), and steelhead (O. mykiss) in the Klickitat Subbasin have been managed to ensure their long-term existence and to provide fishing opportunities. This is an effort to mitigate for the loss of fisheries due to construction of the Columbia River hydroelectric dams. The Klickitat Hatchery, Lyle Falls Fishway, and Castile Falls Fishway were built as part of that effort to mitigate for lost fishing opportunities. These facilities were previously operated by the Washington Department of Fish and Wildlife and then transferred to the Yakama Nation in December 2005 under the Yakima/Klickitat Fisheries Project.

The Klickitat River Operations and Maintenance (K-O&M) Project serves as the project to fund staff and support O&M of existing YKFP infrastructure and recent upgrades to the basin's fish passage facilities: Castile and Lyle Falls fishways. Funding to support Klickitat Hatchery activities is covered under project #1988-115-35.

This SOW identifies funding under K-O&M for the following Klickitat sub-basin facilities:
1. Castile Falls Enumeration Facility
2. Lyle Falls Fishway & Research Facility
3. Klickitat Field Office & Maintenance Shop