# Well grid 77-31, Texas — La Salle — how deep, and through what

> 109 well reports in Texas state well grid 77-31, covering La Salle. Median depth 372 ft.

## Texas well grid 77-31

A 7.5-minute quadrangle of the Texas state well grid, mostly in [La Salle County](/county/la-salle.md). **109** reports, median depth **372 ft**.

### What you will drill through in grid 77-31

*Logged in state well grid 77-31, by depth. The figure is how many wells hit it.*

| Depth, ft | What was logged there |
|---|---|
| 0–25 ft | **Surface** 23 , **Topsoil** 16 , **Clay** 15 , **Top Soil** 8 , **Caliche** 7 , **Sandy Clay** 7 |
| 25–50 ft | **Shale** 6 , **Sand** 4 , **Clay** 3 , **Shale/Sand** 2 , **Blue Shale** 2 , **Grey Clay** 1 |
| 50–100 ft | **Shale** 10 , **Sand** 5 , **Grey Shale** 2 , **Blue Shale** 2 , **Grey Shale / Clay Mix** 1 , **Clay With Sand Stringers** 1 |
| 100–200 ft | **Shale** 10 , **Sand** 9 , **Sandy Shale** 6 , **Grey Clay** 1 , **Grey Limestone** 1 , **Grey Shale With Limestone Streaks** 1 |
| 200–300 ft | **Sand** 19 , **Shale** 8 , **Sandy Shale** 7 , **Grey Sand** 3 , **Gray Sand And Clay** 1 , **Hard Shale** 1 |
| 300–500 ft | **Sand** 11 , **Shale** 8 , **Fine Sand** 5 , **Gray Shale** 2 , **Sandy Shale** 2 , **Brown Clay** 1 |
| 500–1000 ft | **Shale** 9 , **Sand** 3 , **Gray Clay** 2 , **Shale And Sand** 2 , **Sandy Clay Mix** 1 , **Grey Shale** 1 |
| 1000–5000 ft | **Sand** 20 , **Shale** 15 , **Sand And Shale** 6 , **Sand & Shale** 5 , **Carrizo Sand** 6 , **Shale And Sand** 4 |

### Who drills here

*Licensed firms in state well grid 77-31, busiest first.*

| Firm of record | Wells | Median depth, ft | Median yield, gpm | Years |
|---|---|---|---|---|
| [Vortex Drilling, Inc.](/driller/vortex-drilling-inc.md) | 30 | 23 | — | 2011–2019 |
| [Cruz Drilling](/driller/cruz-drilling.md) | 19 | 310 | 45 | 2003–2017 |
| [Bull's Eye Services, LLC](/driller/bull-s-eye-services-llc.md) | 14 | 2,600 | 350 | 2012–2023 |
| [Dennis Drilling Company](/driller/dennis-drilling-company.md) | 13 | 360 | 75 | 2005–2022 |
| [McKinley Drilling](/driller/mckinley-drilling.md) | 7 | 2,318 | 500 | 2010–2018 |
| [Thomas Moy and Sons](/driller/thomas-moy-and-sons.md) | 6 | 2,730 | — | 2012–2016 |
| [Unison Drilling Inc](/driller/unison-drilling-inc.md) | 3 | 2,446 | 350 | 2012–2014 |
| [McGowan Well Drilling](/driller/mcgowan-well-drilling.md) | 2 | 340 | — | 2023 |
| [BULLS EYE SERVICES LLC](/driller/bulls-eye-services-llc.md) | 2 | 2,620 | 350 | 2012–2020 |
| [Thomas Moy and Sons Water Well Drilling Inc.](/driller/thomas-moy-and-sons-water-well-drilling-inc.md) | 2 | 550 | — | 2013 |
| Unison Drilling & Water Well Services | 2 | 2,823 | 250 | 2010 |
| Bullseye Services | 1 | 365 | 15 | 2023 |
| [I&I Pump Service](/driller/i-i-pump-service.md) | 1 | 360 | — | 2015 |
| I&I PumpService | 1 | 300 | — | 2014 |
| PKF Well Service | 1 | 260 | 12 | 2012 |
| [Aquatech Drilling, Inc.](/driller/aquatech-drilling-inc.md) | 1 | 300 | 15 | 2011 |
| Unison Drilling & Water Well Service | 1 | 2,800 | — | 2010 |
| [Edward Pawlik & Son Well Service](/driller/edward-pawlik-son-well-service.md) | 1 | 355 | 150 | 2009 |
| Sarita Well Service | 1 | — | 4 | 2010 |
| ROYALL WINDMILL & PUMP,LLC | 1 | 225 | 10 | 2005 |

### What the wells are for

*Purpose, and how deep each went.*

| Purpose | Wells | Share | Median depth, ft |
|---|---|---|---|
| Domestic | 34 | 31.2% | 340 |
| Environmental Soil Boring | 26 | 23.9% | 23 |
| Rig Supply | 24 | 22.0% | 2,638 |
| Stock | 8 | 7.3% | 305 |
| Industrial | 5 | 4.6% | 372 |
| Fracking Supply | 4 | 3.7% | 2,703 |
| Monitor | 4 | 3.7% | — |
| Irrigation | 3 | 2.8% | 2,305 |

*By decade drilled.*

| Decade | Reports | Median depth, ft | Water at, ft |
|---|---|---|---|
| 2000s | 10 | 320 | 130 |
| 2010s | 89 | 400 | 167 |
| 2020s | 10 | 340 | 170 |

### The deepest reports on file

*Deepest reports in state well grid 77-31. Column one is the tracking number.*

| Report | Year | Depth, ft | Water at, ft | Yield, gpm | Purpose |
|---|---|---|---|---|---|
| 471278 | 2018 | 2,900 | — | — | Fracking Supply |
| 240201 | 2010 | 2,823 | 240 | 250 | Rig Supply |
| 240184 | 2010 | 2,823 | 240 | 250 | Rig Supply |
| 238472 | 2010 | 2,800 | 260 | — | Rig Supply |
| 310287 | 2012 | 2,768 | 430 | — | Rig Supply |
| 312933 | 2013 | 2,764 | — | — | Rig Supply |
| 314217 | 2013 | 2,730 | 400 | — | Rig Supply |
| 645193 | 2023 | 2,703 | — | 600 | Fracking Supply |
| 303258 | 2012 | 2,690 | 250 | — | Rig Supply |
| 436764 | 2016 | 2,640 | 340 | — | Fracking Supply |

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 77-31?

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](/privacy.md).

This grid falls in [La Salle County](/county/la-salle.md).

### Grids with a comparable number of reports

- [87-20](/area/87-20.md)
- [05-26](/area/05-26.md)
- [20-31](/area/20-31.md)
- [28-60](/area/28-60.md)
- [41-18](/area/41-18.md)
- [67-03](/area/67-03.md)
- [69-32](/area/69-32.md)
- [78-64](/area/78-64.md)
- [79-17](/area/79-17.md)
- [05-63](/area/05-63.md)
- [16-59](/area/16-59.md)
- [23-05](/area/23-05.md)
- [30-44](/area/30-44.md)

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Página: https://texas-water-wells.pages.dev/area/77-31/
Fonte: Texas Submitted Driller's Report Database — Texas Water Development Board, from reports filed with the Texas Department of Licensing and Regulation
Recolha: 2026-08-23