Supporters of the Yakima Basin Integrated Plan include:
Agencies
- National Oceanic and Atmospheric Administration, Fisheries Service*
- United States Forest Service*
- United States Bureau of Reclamation*
- Washington State Department of Agriculture*
- Washington State Department of Ecology*
- Washington Department of Fish and Wildlife*
- Yakima Basin Fish & Wildlife Recovery Board*
Business
- American Society of Civil Engineers – Yakima Branch - Letter of Support
- Central Washington Homebuilders Association - Letter of Support
- Kittitas County Chamber of Commerce - Letter of support
- Plum Creek Timber Company - Letter of Support
- Suncadia Resort - Letter of Support
- Yakima County Chamber of Commerce – Letter of support
Local Governments
- City of Cle Elum - Letter of support
- City of Ellensburg - Letter of support
- City of Grandview - Letter of support
- City of Mabton - Letter of support
- City of Moxee – Letter of support
- City of Roslyn - Letter of support
- City of Selah – Letter of support
- City of Sunnyside - Letter of support
- City of Toppenish - Letter of support
- City of Wapato - Letter of support
- City of Union Gap – Letter of support
- City of Yakima*
- City of Zillah – Letter of support
- Town of Granger - Letter of support
- Town of Harrah - Letter of Support
- Town of Naches - Letter of support
- Yakima Valley Conference of Governments - Letter of Support
Community
- Yakima Basin Storage Alliance*
- Yakima County Development Agency – Letter of Support
- Vision Cle Elum - Letter of Support
Conservation
- American Rivers* - Letter of support
- Conservation Northwest - Letter of support
- Forterra
- Kittitas Conservation Trust - Letter of Support
- Mountains to Sound Greenway - Letter of Support
- National Wildlife Federation - Letter of support
- The Nature Conservancy - Letter of support
- The Trust for Public Land
- The Wilderness Society - Letter of support
- Trout Unlimited - Letter of support
- Washington Environmental Council
- Yakima Greenway Foundation – Letter of support
Elected Officials
- Benton County Commission*
- Central Washington Democrats
- Kittitas County Commission*
- Yakima County Commissioners*
- Yakima County Republicans
Irrigation Districts
- Kennewick Irrigation District*
- Kittitas Reclamation District*
- Sunnyside Valley Irrigation District*
- Yakima-Tieton Irrigation District*
Hunting, Fishing and Recreation
- Back Country Horsemen of Washington - Letter of support
- Washington Trails Association - Letter of Support
- Kittitas County Parks and Recreation District #1
Tribal
*Yakima River Basin Water Enhancement Project Working Group Members
