6335 Camp Bullis Rd Suite 25

San Antonio, TX 78257

Phone (210) 698-1155 

Fax (210) 698-1159


©2019 by the Trinity Glen Rose Groundwater Conservation District.

TGR NEWS - February 2020

If you missed a previous issue of our newsletters, just click here to read and or download those issues.

Trinity Aquifer Groundwater Model Update Nearing Completion

Over the past 18 months, the Trinity Glen Rose Groundwater Conservation District (TGR) and San Antonio Water System have been working with a groundwater modeling consultant in updating and recalibrating the Texas Water Development Board (TWDB) Trinity Hill Country Groundwater Availability Model (THCGAM) with the goal of creating a better tool for assessing groundwater availability and conditions in northern Bexar County. Recent calibration results show that the model is performing well in simulating water level conditions caused by recharge and pumping variations.

“These types of modern tools play a critical role in helping the District manage the Trinity Aquifer in Bexar County over a long water-planning horizon,” said TGR General Manager George Wissmann. “This is the same type of modeling program that is used by the State of Texas in approving water pumping goals for groundwater districts like the Trinity Glen Rose District. However, because we have received pumping requests for large amounts of water in the relatively near future, we’ve deemed it necessary to update the groundwater model so we have a more precise way of knowing how these new water withdrawals will affect other Trinity wells in our area.”

The major model updates included refining the model grid from a one-mile to a half-mile grid size within Bexar County, updating the hydraulic conductivity using recent pump test within the Middle Trinity, refining the stress periods from a yearly to a monthly rate, updating the recharge to monthly rates and redistributing recharged based on basins, and converting the model code to better handle dry cell conditions.

TGR District Elections for 2020

The Trinity Glen Rose Groundwater Conservation District (TGR) was created for the purpose of conserving, preserving, recharging, protecting and preventing the waste of groundwater in Northern Bexar County. This May, Board of Directors Districts 1 and 2 are up for election. The last day for filing an application to be on the ballot is February 14th by 5 pm. Candidates must reside within the boundaries of the District in which they are filing for. You can read all about the election and download the board application forms at TGR’s website: www.trinityglenrose.com/district-business.

Watersaver Landscape Schools Back for 2020

Ready to get your hands dirty? Well, we’ll show you the best ways to do that at the next Watersaver Landscape Design Schools scheduled for Saturday, March 7 and Saturday, May 30, at the San Antonio Botanical Center. Each class will run from 8:00 a.m. to 1:30 p.m.

In addition to the great landscaping tips you’ll receive from some of San Antonio’s best landscape experts, each attendee will receive a personalized 20-minute landscape design consultation about their own yard. Also, breakfast will be served and you will head home with a goody bag filled with colorful gardening plant guides and other surprises. The cost is $30 per individual or $50 for a family. These landscape schools fill up quickly, so don’t wait to secure your spot.

Sign up today at: www.GardeningVolunteers.org/design-school.

TGR Moving its Offices to Helotes

In February, the Trinity Glen Rose Groundwater Conservation District (TGR) will be moving its offices from its current location near Camp Bullis Road near I-10 to 14789 Old Bandera Road, City of Helotes, 78023. The office will give the District more space to conduct its business at a lease price that is competitive with the Camp Bullis location. Please be sure to update your files with this new office information.