TGR Board Meeting 

Next Board Meeting:
July 8, 2021  9:30am
Helotes City Hall Council Chambers 12951 Bandera Rd, Helotes, Tx and via Zoom

Learn About the Trinity Glen Rose District

Abigail Bush

District 1

Joe duMenil

District 2

Harris Dickey

District 3

Joe Silman

District 4

Jorge Gonzalez

District 5

Use the map above to locate your District when using Google Chrome, Mozilla Firefox, and Microsoft Edge. 
For Safari users, click here to determine the District in which you reside.

The Trinity Glen Rose Groundwater Conservation District (TGRGCD or District) was created for the purpose of conserving, preserving, recharging, protecting and preventing waste of groundwater from the Trinity Aquifer in Northern Bexar County. The District was also created in response to the Texas Natural Resources Conservation Commission designating a portion of the Trinity Aquifer within Bexar Country as a Priority Groundwater Management Area (PGMA).


The Trinity Glen Rose Groundwater Conservation District is the governing body of only that portion of the Trinity Aquifer that is located in northern Bexar County. This Aquifer is considered very important to the State of Texas and subject to the provisions in Chapter 35 of the Texas Water Code. The TNRCC designated this area a PGMA in January 2001 and created the TGRGCD in order that appropriate groundwater management techniques and strategies could be implemented at the local level to address groundwater issues or problems within the District. A PGMA designation is given to an area “that is experiencing, or is expected to experience critical groundwater problems.” One of the primary reasons that a PGMA was designated in this area is the explosive growth in North Bexar and surrounding counties.


The duty of the TGR Board members will be to ensure that the water in the aquifer is managed in a reasoned and balanced manner to allow for growth in the area, while still preserving the ability of residents or their water suppliers to draw water for their families.


The District will conduct administrative and technical activities and programs to achieve these purposes. The District will collect and archive water well and aquifer data, regulate water well drilling and production from non-exempt wells, promote the capping or plugging of abandoned wells, provide information and educational material to local property owners, interact with other governmental or organizational entities, and incorporate other groundwater-related activities that may help meet the purposes of the District.

Enacting Legislation

The Trinity Glen Rose Groundwater Conservation District was created by HB 2005 during the 77thTexas Legislature. HB 2005 was authored by State Representatives Frank Corte Jr. and John Shields and sponsored by Senator Jeff Wentworth. The bill was signed into law and took effect on September 1, 2001 and confirmed by voters in 2002.  The District was created as a result of the Texas Commission on Environmental Quality (TCEQ) designating the Trinity group of aquifers lying within northern Bexar County as a Priority Groundwater Management Area (PGMA). 


In 2009, the 81st Texas Legislature passed HB1518 allowing an increase of production fees and allowing municipalities to request inclusion of annexed areas into the District as provided by Chapter 36 Texas Water Code.


The mission of the District is to provide rules and regulations to manage, conserve, preserve, protect, maximize recharge and prevent waste of the water resources within the section of the Trinity Aquifer located in northern Bexar County.

Trinity Glen Rose District Board Members

Dr. Stuart Birnbaum

District 1

Joe duMenil

District 2

Board Chairman

Harris Dickey

District 3

Asst. Secretary-Treasurer

Joe Silman

District 4

Board Treasurer

Jorge Gonzalez

District 5

Board Vice President

Dr. Stuart Birnbaum is the District 1 elected representative and was appointed to the TGR Board in December 2020 and took his oath of office in January. He will be finishing out the three-year term of office formerly held by Abigail Bush. Birnbaum is an emeritus associate professor in the department of geological sciences at the University of Texas at San Antonio where he conducted research in sedimentology and microbial geochemistry. He earned his B.S. degree in geology from the State University of New York at Stony Brook and his Ph.D. in geology from Cambridge University in the UK. 

Since retiring Birnbaum has been actively engaged with Citizens’ Climate Lobby serving as a co-leader of the San Antonio chapter of CCL. He is also a Board member of the Scenic Loop – Helotes Creek Alliance, a local environmental organization, and is an En-ROADS ambassador with Climate Interactive.

District 1 boundaries cover the area near the City of Helotes. See the map above.

Joe duMenil is the District 2 (Board Chairman) elected representative and currently serves as President of the Trinity Glen Rose Groundwater Conservation District (TGRGCD) board. He has served the District for five years and brings a wealth of engineering and construction experience to the board's leadership.


Following completion of undergraduate and graduate degrees at Texas A&M, duMenil spent 20 years as a combat engineer in the U.S. Army Corps of Engineers. His military service culminated as the Deputy District Engineer in the Memphis District. In 2001, he was selected to head up San Antonio's Stormwater Utility, a $27 million operation which focused on maintaining existing infrastructure and orderly development. duMenil's most recent work has been with engineering consultant LNV.


District 2 encompasses the largest geographic area in the TGRGCD area. The western boundary is Highway 16 in the Helotes area, Camp Bullis on the east, Loop 1604 on the south and the Bexar County line to the north. Small parts of Kendall and Comal Counties also reside within D2.


Fair Oaks Ranch and many other subdivisions dot the D2 region, and the environmentally protected Government Canyon Nature Park stands out as a focal point. The I-10 corridor from Loop 1604 to Boerne has dramatically developed in the last several years and that leads to some of duMenil's primary concerns about the District.


He says that everyone living and working over the Trinity Glen Rose Aquifer need to become more aware of the aquifer and practice sound water conservation and pollution prevention techniques each day. He stated the board is committed to increasing outreach to TGRGCD residents and business owners to help them understand the importance of preserving and protecting the aquifer.

Harris Dickey is the District 3 director. He is a retired professional from the retail business sector and currently focuses his District 3 attention on the large federal area located in the district along with two major parks. 


The largest development in District 3 is Timberwood Park, where the lot sizes are larger than the typical home-sites. Camp Bullis and Camp Stanley cover most of the western portion of the district. Timberwood can be found on the east. The southern boundary runs up against the Stone Oak area and the Cibolo Creek forms most of the northern boundary. 


Eisenhauer Park is a highly used urban park in District 3, and Panther Springs Creek Nature Area is a family friendly park residing in the district.


A unique aspect of D-3 is that three creeks, Leon, Salado, Panther Springs, run through the area. These tributaries are often included in water quality discussions due to their potential recharge to the aquifers which underlie them.

Joe Silman is the elected representative for TGRGCD District 4. He is a retired partner with Andersen Consulting (now Accenture) and he focused his business consulting with water, electric and gas utilities. In addition to serving on the TGRGCD board, Silman also is President of the Stone Oak POA Board of Directors.


District 4 is the most densely populated in the TGRGCD.  It includes the growing Stone Oak area with its 27 subdivisions, plus robust business and medical developments. Additionally, the Club at Sonterra and Martin Marietta Hwy 281 quarry are located within District 4. The southern boundary of District 4 is Loop 1604, Wilderness Oak on the north, NW Military Highway to the west and Highway 281 on the east.


Silman knows that with many homes and large water using businesses in the area, water conservation must be a high priority for all who receive their water from either San Antonio Water System Edwards Aquifer or Trinity Glen Rose wells. In the coming months, the TGRGCD will be enhancing its conservation messaging to encourage the focused stewardship of the area's water resources.

Jorge Gonzalez was elected to serve District 5 and represents the eastern reach of the Trinity Glen Rose District. This is the second largest district in geographic size and has a highly faulted underground structure. 


Wholly situated east of Highway 281, the district runs from 1604 to the county line on north, bounded on the west by Highway 281, and Cibolo Creek on the north and east.  This is the least developed area, but in recent years has seen increased commercial activity along the 281 corridor.


The recently developed PGA Village Golf Course and Marriott Resort are two of the more recognizable destinations in D5. Those developments occurred under high scrutiny from the public and have proven to be good environmental neighbors to the area.


The Vulcan Quarry mines limestone in northern Bexar County and is subject to various environmental regulations due to its proximity to recharge features and aquifer water.

TGR District 2020 Annual Financial Audit
TGR District 2020-2021 Budget
TGR District 2020 Annual Report
TGR District 2018 Annual Financial Audit
District Rules
District Forms

The following forms are for citizens of the TGR District and well drillers who need to register an existing well, drill a new well, plug a well, or wish to make modifications to their existing well. If you have questions, don't hesitate to contact us.


Please Note: All Wells issued permits December 1st, 2004 and after MUST have a Natural Gamma-Ray Log run on them and submitted to the Trinity Glen Rose Groundwater Conservation District along with the State Well Drillers Report and a completed Application to Register a Well.


Print out the forms to fill out and send to appropriate locations listed below.


Notice of Intent to Drill, Modify, or Plug Existing Well and Well Registration Form (pdf file)

*Note - there is no fee to register an existing well.
  Fees for drilling, plugging, or modifying a well are listed on Notice of Intent Form.

To submit a completed form or materials, please send it to the appropriate address.

Send completed Notice of Intent forms and payment to:

San Antonio Water System c/o Elizabeth Gomez, SAWS

2800 US HWY 281 N

San Antonio, TX 78212

Phone (210) 233-2349

Send registrations for existing wells to:

Trinity Glen Rose GCD

12790 FM 1560 N. Box 1589
Helotes, Texas 78023

Phone (210) 219-5555

Fax (210) 698-1159 

Exportation Permit Application.pdf