1) Bear Paw Development Corporation of Northern Montana

2) Central Platte Natural Resources District

3) Colorado River Water District

4) Columbia Basin Development League

5) Desert Water Agency

6) Diamond Plastic Corporation

7) Dig Deep Research, LLC

8) Elephant Butte Irrigation District

9) Greater Wenatchee Irrigation District

10) HDR Engineering, Inc.

11) Kennewick Irrigation District

12) Kinsey Irrigation Company

13) Loup Basin Irrigation District

14) Lower Platte NRDs

15) National Water Resources Association

16) North Dakota Water Users Association

17) Northwest Pipe Company

18) Roosevelt Water Conservation District

19) Rubicon Water

20) Sidney Water Users Irrigation District

21) Washington State Water Resources Association