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Comal Trinity GCD Board of Directors

Larry (Skip) Hull



Larry Hull is a native Texan and a graduate of Texas A&M University. Following graduation, he served in the United States Army in the Republic of South Vietnam. He retired from AT&T in 2000 after 32 years of service and returned to his property on the Guadalupe River where he operates a small ranch and farm. Larry is the current President of the Guadalupe River Association, Past President of the Comal County Emergency Services District No. 4, Past Secretary of the Bulverde-Spring Branch Emergency Services Council, serves on the Board of Directors of the State Association of Fire and Emergency Services Districts and is Treasurer of the Comal County Child Welfare Board. Larry was appointed to the Comal Trinity Groundwater Conservation District by the Comal County Commissioners Court to represent Precinct 1. He appreciates the water concerns and the conservation efforts by all the citizens in Comal County and encourages participation in the efforts of the groundwater conservation district. He can be contacted on his cellphone (210) 414-2497.

Current Precinct 1 term expires 2023.

Rob Johnson

Vice President

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Rob Johnson graduated from the University of Texas at Austin with a BBA in 1976 and earned his Juris Doctorate from South Texas College of Law in 1978. Since 1984 he has been a Partner in the Austin law firm of Johnson & Johnson which specializes in work before the Texas Legislature and various state agencies. Rob's early job experience included work for the House of Representatives, Secretary of Senate, Legal Counsel to Senate Administration Committee, and the Business Tax Division of the Comptroller's office. He gained extensive civil litigation experience in private practice in the Houston area from 1979 to 1982. From 1986 to 2004, Rob served as Director/Shareholder of the Coastal Banc Savings Association in Houston, Texas. Coastal Banc Savings completed the first federally assisted takeover of insolvent Texas Savings & Loans under the Federal Home Loan Bank Board's Southwest Plan. This $3 billion institution was sold to Hibernia National Bank in May of 2004. From 2007 to 2010 Rob was Director/ Shareholder with Green Bank, Inc. of Houston, TX. From 2002 to 2013 he was a School Board Trustee with the New Braunfels Independent School District. From 1992 to 2002 Rob served as the Director and primary financier of the Capitol School of Austin, TX, a private non-profit school established in the Fall of 1990 as Austin's first educational group therapy setting created exclusively for young children with language-based problems and learning disorders. Rob married Teresa Ohlrich of New Braunfels in 1985 and they are proud to be the parents of four children: Katie, Haley, Jake, and Ross.

Rob was appointed to the CTGCD board of directors by the Comal County Commissioners Court. His current term expires 2025.

David Davenport


David Davenport was appointed to the Comal Trinity GCD Board of Directors by the Comal County Commissioners Court to represent the municipal interest in New Braunfels. He is a native Texan and has lived in Guadalupe and Comal County in the New Braunfels area all his life. He serves a four year term on the Board.  


He began his career as an operator for Springs Hill Water Supply Corporation in 1972. From there he became Operations Manager of Green Valley Special Utility District in 1978 and moved to General Manger in 1982.  David Davenport retired as General Manager of Canyon Regional Water Authority in 2022. He held that position since 1992.

Canyon Regional is a wholesale regional water supply authority comprised of 12 utilities serving over 80,000 water service accounts


His employment experience allowed him to develop an extensive knowledge of water right permitting and groundwater law. He has spent considerable time at the Texas Legislature monitoring the development of law regarding the water supply industry, including the legislation that created the Edwards Aquifer Authority, Gonzales County Groundwater District, Guadalupe Groundwater District, Canyon Regional Water Authority, Southeast Trinity Groundwater District and many more.


He has been a director of the Texas Section of the American Water Works Association, and is currently the representative for Guadalupe County on the South Central Texas Water Advisory Committee of the Edwards Aquifer Authority.  In addition to service in the water industry, David Davenport had been a council member and Mayor pro tem for the City of Marion, President of the Marion Lions Club, and an officer for several other social organizations. He is a past Board member and Chair with the Water Oriented Recreation District of Comal County, past Chairman on the New Braunfels Parks Board and is a Board member of the New Braunfels Parks Foundation and Texas River Protection Association.  He has served as a member of the Board of the Hays Caldwell Public Utility Authority. He currently is the Chairman of the River Advisory Committee with the City of New Braunfels.  Current term expires 2025.                                                                    (Updated 11/21/22)

Larry Sunn


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Dr. Larry Sunn was appointed to the Comal Trinity GCD Board of Directors by action of the Comal County Commissioners Court in 2015 to be the Comal Trinity GCD Board's representative for the greater Bulverde Spring Branch area, and he serves the Trinity Aquifer interests of all Comal County residents. 


Larry, a retired US Marine Corp officer, served two years in Vietnam with Marine Corps ground forces and retired as a Captain in 1982.  He is a retired university professor of statistics and research from the University of Redlands in Redlands, CA.  Larry serves his community as a Director and Secretary on this CTGCD Board; as the Chair of the Endowment Committee in his duties as a director on the board of Healthcare Innovation Sciences (H.I.S.); and he is President of the of the Bulverde Community Parks Association. 


Presently, Dr. Sunn, along with Dr. Steven Grainger, provides free-to-the-public rain harvesting consultations as a public service of the CTGCD and Comal Master Gardeners.  Dr. Sunn and Dr. Grainger schedule rain harvesting appointments via their website.  Larry lives in Bulverde with his high school sweetheart and wife of 60 years, Margie.  They have two children and four grandchildren.  The Sunns retired to the Bulverde area in 2003 where they self-built a tri-geodesic dome complex as their home. 


Dr. Sunn can be reached regarding Comal Trinity GCD business by mail at the CTGCD mailing address: PO Box 644, Spring Branch, TX 78163; by email at; or by phone at 210.286.8050.  Dr. Sunn's current term expires on July 31, 2023.                                             (Updated 11/20/22) 

Connie Lock

Connie Lock was appointed by the Comal County Commissioners Court representing Precinct 2 in June, 2021, and completing the term of the board member that resigned.  Ms. Lock's term will expire in 2023.

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Larry Jackson

Larry Jackson was appointed by the Comal County Commissioners Court to the CTGCD Board in November 2020, representing Precinct 3. Mr. Jackson's current term expires in 2023.


Currently, Mr. Jackson is the Director of Customer Service and Communications at Canyon Lake Water Service Company, one of the largest water utilities serving Comal County and the Texas Hill Country.  He graduated in 1988 from Southwest Texas States University with a BA in International Studies and received an MA in International Relations from St. Mary’s University in San Antonio in 1991.  Committed to water conservation and the preservation of water quality in the area, Larry is involved in numerous county-wide activities and organizations focused on maintaining and improving the quality of life in our community. 


A lifelong resident of the Texas Hill Country, Mr. Jackson has lived in Comal County since 2002 with his wife of 33 years, Moira, a Senior Lecturer of French and Italian at Texas State University.                  (Updated 12/7/2022)

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Alan Brown

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Dr. Alan Lee Brown was appointed to the CTGCD Board by Comal County Commissioners Court on August 26, 2021 representing Precinct 4 for a four year term, expiring July 31, 2025.

Alan is a geoscience professional, with over 44 years of familiarity with multi-disciplinary work environments with expertise in the integration and interpretation of multi-discipline geological-geophysical-petrophysical surface and subsurface information. He has unique experience with the design and implementation of software user interfaces and the specification of software product functionality for geoscience interpretation applications and has managed cross discipline teams in both geoscience and computer science collaborative workgroup environments. He has broad experience with oil and gas industry. He specializes in individualized and group training and mentoring.


Past work experience includes Amoco Production Co., Landmark Graphics (HUL), Bureau of Economic Geology (BEG) of Texas, and Schlumberger Oil Field Services. He currently works at ABROWN G-G & P TRAINING LLC specifically for individualized or group training, mentoring and project support through domain lecture, and software integration across multi-domain geoscience areas including geologic mapping, modeling of reservoir stratigraphic and structural systems combined with integration of petrophysical and geophysical attributes. Alan is a AAPG Certified Petroleum Geologist and serves as Advisor and Adjunct Profs at LSU and WVU. Education; Ph.D., Geology, Louisiana State University, 2002; Amoco Petrophysics Program 1998-99; M.S., Geology, West Virginia University, 1983; B.A., Geology, Madison College (now James Madison University), 1977.


Alan has lived in the Hill Country since 1999, currently in Fischer, Texas with his wife of 45 years, Leigh, a retired Special Ed. Teacher. Phone contact is 512-708-0036.

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