The SCTRWPG is composed of planning group members representing various interest groups. It is guided by the Texas Water Development Board, led by an Executive Committee, governed by bylaws, and supported by the San Antonio River Authority and a team of technical consultants. The existing members vote for new planning group members when a vacancy occurs or terms expire.

Nomination Form

Executive Committee

Chair Tim Andruss
Vice Chair Adam Yablonski
Secretary Gary Middleton
At-Large Humberto Ramos
At-Large Steve Graham

Voting Membership

Interest Name Entity County (Location of Interest) Term
Public Dianne Wassenich League of Women Voters Bexar and 2 other counties in the region 2028
Counties Andra Wisian Kendall County Commissioners Court Kendall 2028
Travis Pruski Wilson County Wilson 2026
Municipalities Gary Middleton City of Victoria Victoria 2026
Robert Puente San Antonio Water System Bexar 2026
Thomas Taggart City of San Marcos Hays 2026
Ryan Kelso New Braunfels Utilities New Braunfels 2028
Groundwater Management Areas Terrell Graham GMA 15 Goliad and 5 other counties in the region Indefinite
Darrell Brownlow GMA 13 Atascosa and 12 other counties in the region Indefinite
Curt Campbell GMA 9 Kendall and 4 other counties in the region Indefinite
Daniel Meyer GMA 10 Hays and 6 other counties in the region Indefinite
Vic Hilderbran GMA 7 Uvalde Indefinite
Industries Jason Ammerman Dow Chemical Calhoun 2029
Dan Yoxall San Antonio Manufacturers Association Bexar 2027
Agricultural Tom Jungam Rancher Karnes 2028
Adam Yablonski Medina County Farm Bureau Medina 2026
Weldon Riggs South Texas Independent Cattleman's Association Atascosa, Bexar, Karnes, and Wilson 2026
Environmental Vanessa Puig-Williams Environmental Defense Fund Texas Water Program 2026
Charlie Flatten Hill Country Alliance Bexar, Comal, Kendall, Hays, and Medina 2026
Small Businesses Mitchell Sowards Entrust Technology Bexar 2028
Darren Simmmons Biosure North America LLC Bexar 2026
Elec. Generating Utilities Ryan Bayle Luminant Hays and Goliad 2028
River Authorities Jonathan Stinson Guadalupe-Blanco River Authority Guadalupe and 9 other counties in the region 2026
Steve Graham San Antonio River Authority Bexar, Goliad, Karnes and Wilson 2025
John Byrum Nueces River Authority Uvalde, Zavala, Frio, La Salle, Dimmit, Atascosa and Medina 2024
Water Districts Aarin Teague Evergreen Underground Water Conservation District Atascosa, Frio, Wilson and Karnes 2029
Roland Ruiz Edwards Aquifer Authority Caldwell, Hays, Comal, Guadalupe, Bexar, Medina and Uvalde 2028
Tim Andruss Victoria County Groundwater Conservation District Victoria 2028
Debbie Farmer Wintergarden Groundwater Conservation District Dimmit, La Salle, Zavala 2026
Water Districts (Non-Groundwater District) Humberto Ramos County Line Special Utility District Atascosa, Bexar, Caldwell, Comal, Guadalupe, Hays, and Wilson 2028
Water Utilities Scooter Mangold Yancey Water Supply Corporation Medina 2026
Andrew McBride Schertz Seguin Local Government Corporation Guadalupe, Bexar, and Comal 2028

Non-Voting Membership

Name Entity
Carly Rotzler Texas Parks and Wildlife Department
Iliana Delgado South Texas Watermaster, TCEQ РRegion 13
Michele Foss Texas Water Development Board
Jamie McCool Texas Department of Agriculture
Rusty Ray Texas State Soil & Water Conservation Board
Charles Wiedenfeld Region J Liaison 
Tom Hegemier Region K Liaison
Don McGhee Region M Liaison
Carl Crull Region N Liaison