Texas well grid 77-23
A 7.5-minute quadrangle of the Texas state well grid, mostly in Frio County and La Salle County. 126 reports, median depth 260 ft.
126Reports
260 ftMedian depth
131 ftWater at
45 gpmMedian yield
What you will drill through in grid 77-23
| Depth, ft | What was logged there |
|---|---|
| 0–25 ft | Surface 34, Clay 13, Sandy Clay 12, Concrete 10, Sandstone 10, Top Soil 9 |
| 25–50 ft | Shale 6, Blue Shale 5, Clay 3, Yellow Clay 3, Gravel 2, Caliche 2 |
| 50–100 ft | Shale 9, Sand 5, Blue Shale 5, Sandy Shale 5, Clay/Sand 2, Shale/Sand 2 |
| 100–200 ft | Sand 24, Sandy Shale 13, Shale 8, Sandy 2, Clay 1, Hard Rock 1 |
| 200–300 ft | Sand 25, Shale 18, Rock 3, Sandy Shale 4, Blue Shale 2, Shale & Sand / Td 1 |
| 300–500 ft | Shale 6, Sandy Shale 5, Sand/Shale 2, Sand 1, Sand & Shale 1, Sandy Clay 1 |
| 500–1000 ft | Shale 8, Sand 2, Shale, Rock Layers 1, Sandy Shale 1 |
| 1000–5000 ft | Shale 7, Sand 6, Carrizo Sand 5, Sandy Shale 3, Sand, Shale Layers 3, Sand & Shale 1 |
Who drills here
| Firm of record | Wells | Median depth, ft | Median yield, gpm | Years |
|---|---|---|---|---|
| Vortex Drilling, Inc. | 55 | 15 | — | 2007–2018 |
| Cruz Drilling | 30 | 260 | 45 | 2003–2015 |
| Mathers Environmental Drilling Inc. | 9 | 10 | — | 2020 |
| McKinley Drilling | 7 | 2,025 | 1,000 | 2009–2022 |
| Dennis Drilling Company | 6 | 300 | — | 2006–2022 |
| Bull's Eye Services, LLC | 6 | 345 | 17 | 2012–2024 |
| Unison Drilling Inc | 3 | 2,400 | 300 | 2011–2012 |
| Thomas Moy and Sons Water Well Drilling Inc. | 2 | 300 | 70 | 2025–2026 |
| Water Well Services, Inc. | 2 | 2,104 | 800 | 2012–2014 |
| SHEPHERD DRILLING | 1 | 240 | 20 | 2024 |
| I&I Pump Service | 1 | — | — | 2015 |
| Thomas Moy & Sons | 1 | 533 | 25 | 2008 |
| Everett Carroll Water Well Service & Drilling Co. | 1 | 160 | 35 | 2003 |
What the wells are for
| Purpose | Wells | Share | Median depth, ft |
|---|---|---|---|
| Environmental Soil Boring | 61 | 48.4% | 10 |
| Domestic | 43 | 34.1% | 260 |
| Irrigation | 8 | 6.3% | 2,002 |
| Rig Supply | 4 | 3.2% | 2,400 |
| Industrial | 3 | 2.4% | 2,133 |
| Monitor | 3 | 2.4% | 21 |
| Stock | 2 | 1.6% | 260 |
| Public Supply | 1 | 0.8% | 2,104 |
| Decade | Reports | Median depth, ft | Water at, ft |
|---|---|---|---|
| 2000s | 21 | 245 | 95 |
| 2010s | 88 | 260 | 140 |
| 2020s | 17 | 10 | 140 |
The deepest reports on file
| Report | Year | Depth, ft | Water at, ft | Yield, gpm | Purpose |
|---|---|---|---|---|---|
| 282205 | 2012 | 2,464 | 220 | 588 | Rig Supply |
| 299747 | 2012 | 2,400 | 475 | 300 | Rig Supply |
| 442646 | 2017 | 2,192 | 414 | 600 | Rig Supply |
| 312909 | 2012 | 2,133 | 420 | 200 | Industrial |
| 386817 | 2014 | 2,104 | 540 | 800 | Public Supply |
| 284893 | 2012 | 2,065 | 383 | 300 | Fracking Supply |
| 352489 | 2013 | 2,025 | 575 | 1,000 | Irrigation |
| 268865 | 2011 | 2,019 | 480 | 1,200 | Irrigation |
| 639194 | 2022 | 2,002 | 522 | 1,000 | Irrigation |
| 225732 | 2008 | 533 | 131 | 25 | 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 77-23?
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 Frio County, La Salle County, Goliad County.