Texas well grid 68-20
A 7.5-minute quadrangle of the Texas state well grid, mostly in Bexar County and Starr County. 310 reports, median depth 480 ft.
310Reports
480 ftMedian depth
272 ftWater at
15 gpmMedian yield
What you will drill through in grid 68-20
| Depth, ft | What was logged there |
|---|---|
| 0–25 ft | Topsoil 28, Tan Lime 22, Top Soil 20, Caliche 17, Tan Limestone 13, Limestone 9 |
| 25–50 ft | Tan Limestone 5, Grey Limestone 4, Gray Limestone. 3, White Rock 3, Tan Rock 3, Limestone 3 |
| 50–100 ft | Tan Limestone 10, Lt.Gray Lime Few Shale St. 7, Grey Limestone 6, Tan Lime 5, Med Hard Yellow Rock 4, Tan Rock 4 |
| 100–200 ft | Tan Lime 13, Tan Limestone 8, Tan Rock 7, Gray Lime 4, Gray Limestone 6, Lt.Gray Lime 6 |
| 200–300 ft | Tan Lime 13, Tan Limestone 12, Lt.Gray Lime 10, Gray Limestone 6, Tan Rock 7, Gray Lime 6 |
| 300–500 ft | Lt.Gray Lime 18, Bexar Shale 18, Tan Lime 11, Tan Limestone 11, Lt.Gray Lime Few Intermitten Frac. 12, Gray Limestone 6 |
| 500–1000 ft | Td 12, Cow Creek 6, Gray Lime 6, Tan Limestone 4, Bexar Shale 5, Lt.Gray Lime 5 |
Who drills here
| Firm of record | Wells | Median depth, ft | Median yield, gpm | Years |
|---|---|---|---|---|
| Geoprojects International, Inc. | 68 | 311 | 55 | 2002–2024 |
| TR Drilling & Service LLC | 33 | 560 | 20 | 2003–2026 |
| Vortex Drilling, Inc. | 33 | 35 | — | 2009–2016 |
| SCI | 22 | — | — | 2010 |
| Martinez Water Well | 20 | 520 | 20 | 2005–2013 |
| Spring Branch Water Well Service | 15 | 660 | 10 | 2015–2025 |
| Puddle Jumper Well Company | 13 | 550 | 15 | 2004–2023 |
| H. W. Schwope & Sons Inc. | 10 | 575 | 15 | 2004–2015 |
| Talon/LPE | 9 | 145 | — | 2022 |
| White Drilling Company, Inc. | 8 | 75 | — | 2006–2008 |
| Davenport Drilling & Pump Service | 7 | 872 | 150 | 2003–2020 |
| H & H Drilling | 7 | 560 | 10 | 2006–2020 |
| BoMax Industries, Inc. | 7 | 700 | 12 | 2003–2013 |
| Vortex Drilling Partners, LP | 5 | 8 | — | 2022–2023 |
| Directed Technologies Drilling | 5 | — | — | 2008 |
| American Water Well Services Inc. | 4 | 710 | 50 | 2022–2025 |
| Geoprojects Int'l | 4 | 300 | — | 2017–2018 |
| Armadigger, Inc. | 4 | 560 | 20 | 1996–2009 |
| Louis Bergmann and Sons | 4 | 480 | 55 | 2003 |
| TR Drilling and Service | 3 | 500 | — | 2024–2025 |
| Zavala Drilling, CO | 3 | 250 | — | 2012–2023 |
| Kutscher Drilling | 3 | 490 | 10 | 2017–2019 |
| Pipe Creek Water Well, Inc. | 2 | 500 | 40 | 2005–2009 |
| Hood Drilling | 2 | 600 | 15 | 2002–2003 |
| D K Drilling and Water Systems | 1 | 510 | 30 | 2025 |
What the wells are for
| Purpose | Wells | Share | Median depth, ft |
|---|---|---|---|
| Domestic | 128 | 41.3% | 580 |
| Monitor | 82 | 26.5% | 159 |
| Environmental Soil Boring | 62 | 20.0% | 22 |
| Public Supply | 11 | 3.5% | 579 |
| Irrigation | 6 | 1.9% | 710 |
| Industrial | 6 | 1.9% | 538 |
| Closed-Loop Geothermal | 5 | 1.6% | 250 |
| Injection | 5 | 1.6% | — |
| Decade | Reports | Median depth, ft | Water at, ft |
|---|---|---|---|
| 1990s | 1 | — | 325 |
| 2000s | 121 | 425 | 259 |
| 2010s | 129 | 500 | 300 |
| 2020s | 59 | 520 | 270 |
The deepest reports on file
| Report | Year | Depth, ft | Water at, ft | Yield, gpm | Purpose |
|---|---|---|---|---|---|
| 1656 | 2001 | 1,022 | 189 | 314 | Public Supply |
| 156469 | 2003 | 1,000 | 214 | 1,000 | Public Supply |
| 94244 | 2006 | 980 | 650 | 7 | Domestic |
| 332292 | 2006 | 940 | 360 | 15 | Domestic |
| 153481 | 2008 | 920 | 510 | 10 | Domestic |
| 42818 | 2000 | 910 | 255 | 350 | Public Supply |
| 194361 | 2009 | 900 | 355 | 15 | Domestic |
| 340801 | 2013 | 872 | 440 | 150 | Public Supply |
| 186334 | 2009 | 865 | — | 30 | Domestic |
| 383225 | 2014 | 860 | 130 | 35 | Domestic |
Every figure here comes from a report a licensed driller filed on the day the work ended — sometimes decades ago. It describes what was found then, not what a well yields today, and it is not a statement that any well is sound, potable or still in use.
Drilling a well near grid 68-20?
Depth is only half the quote. What it costs depends on the rock, the casing and the pump. Tell us where and we pass the request to licensed Texas drillers.
We are nobody's agent and have no arrangement with any firm today. What we do with this.
This grid falls in Bexar County, Starr County, Comal County, Bandera County.