# Well grid 57-12, Texas — Llano — how deep, and through what

> 235 well reports in Texas state well grid 57-12, covering Llano. Median depth 120 ft.

## Texas well grid 57-12

A 7.5-minute quadrangle of the Texas state well grid, mostly in [Llano County](/county/llano.md). **235** reports, median depth **120 ft**.

### What you will drill through in grid 57-12

*Logged in state well grid 57-12, by depth. The figure is how many wells hit it.*

| Depth, ft | What was logged there |
|---|---|
| 0–25 ft | **Topsoil** 175 , **Red Granite** 38 , **Granite Gravel** 35 , **Red Sandy Clay** 26 , **Granite Gravel & Clay** 15 , **Gray Granite** 13 |
| 25–50 ft | **Red Granite** 15 , **Gray Granite** 9 , **Black And Red Granite** 8 , **Red And Grey Granite** 5 , **Granite Gravel** 4 , **Rd And Blk Meta** 3 |
| 50–100 ft | **Red Granite** 17 , **Red & Black Metamorphic** 3 , **Fractured Black Granite** 1 , **Black Granite** 2 , **Gray Granite** 2 , **Gray Very Hard Granite** 1 |
| 100–200 ft | **Red Granite** 4 , **Stop** 2 , **Red & Black Metamorphic** 2 , **Red Metamorphic** 2 , **Red Granite Fractures** 1 , **Black Granite W/Fine Quartz** 1 |
| 200–300 ft | **Red Sandstone** 3 , **Heavily Fractured Pink Qtz Chunks** 1 , **20Gpm** 1 , **Heavy Fracture Black/Grey Granite** 1 , **30Gpm** 1 , **Fractured -Stop 35+Gpm** 1 |
| 300–500 ft | **Red Sandstone** 3 , **Hickory Sand** 2 , **Brown Sandstone** 1 , **Granite** 1 , **Gray Limestone W/ Red Sandsont Streaks** 1 , **Gray Limestone** 1 |
| 500–1000 ft | **Red Sandstone** 1 , **Gray Sandstone (Welge)** 1 , **Dark Gray Sandstone W/Limestone Streaks (Lion Mt.)** 1 , **Red Blue And Green Sandstone** 1 , **Hickory Sand & Blue Sandstone** 1 , **Blue & Green Sandstone** 1 |

### Who drills here

*Licensed firms in state well grid 57-12, busiest first.*

| Firm of record | Wells | Median depth, ft | Median yield, gpm | Years |
|---|---|---|---|---|
| [Virdell Drilling Inc.](/driller/virdell-drilling-inc.md) | 90 | 120 | 15 | 2001–2019 |
| [Walden Drilling Inc](/driller/walden-drilling-inc.md) | 57 | 120 | 7 | 2012–2025 |
| [Magill Drilling & Water Well Service, LLC](/driller/magill-drilling-water-well-service-llc.md) | 51 | 125 | 8 | 2017–2024 |
| [Highland Drilling Inc.](/driller/highland-drilling-inc.md) | 16 | 360 | 20 | 2003–2011 |
| [Bee Cave Drilling, Inc.](/driller/bee-cave-drilling-inc.md) | 9 | 120 | 20 | 2021 |
| [BoreTek LLC](/driller/boretek-llc.md) | 3 | 180 | — | 2024–2026 |
| [Apex Drilling, Inc.](/driller/apex-drilling-inc.md) | 3 | 220 | 18 | 2014–2026 |
| brian Walden drilling | 3 | — | 50 | 2011 |
| [Magill Drilling](/driller/magill-drilling.md) | 2 | 125 | — | 2015 |
| [Texan Water](/driller/texan-water.md) | 1 | 360 | — | 2021 |

### What the wells are for

*Purpose, and how deep each went.*

| Purpose | Wells | Share | Median depth, ft |
|---|---|---|---|
| Domestic | 186 | 79.1% | 120 |
| Stock | 43 | 18.3% | 160 |
| Test Well | 4 | 1.7% | 80 |
| De-watering | 1 | 0.4% | 130 |
| Irrigation | 1 | 0.4% | 160 |

*By decade drilled.*

| Decade | Reports | Median depth, ft | Water at, ft |
|---|---|---|---|
| 2000s | 61 | 120 | 36 |
| 2010s | 100 | 120 | 30 |
| 2020s | 74 | 145 | 27 |

### The deepest reports on file

*Deepest reports in state well grid 57-12. Column one is the tracking number.*

| Report | Year | Depth, ft | Water at, ft | Yield, gpm | Purpose |
|---|---|---|---|---|---|
| 484518 | 2018 | 660 | 250 | 30 | Domestic |
| 212722 | 2010 | 600 | 392 | 20 | Domestic |
| 308570 | 2013 | 560 | 326 | 40 | Stock |
| 254209 | 2011 | 540 | 360 | 20 | Domestic |
| 172746 | 2009 | 540 | 385 | 20 | Domestic |
| 57988 | 2005 | 540 | 310 | 20 | Domestic |
| 501434 | 2019 | 485 | — | 11 | Domestic |
| 84012 | 2006 | 455 | 104 | 20 | Domestic |
| 59866 | 2005 | 440 | 264 | 15 | Domestic |
| 71373 | 2005 | 380 | 94 | 30 | 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 57-12?

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 [Llano County](/county/llano.md).

### Grids with a comparable number of reports

- [07-61](/area/07-61.md)
- [25-64](/area/25-64.md)
- [40-57](/area/40-57.md)
- [43-32](/area/43-32.md)
- [21-51](/area/21-51.md)
- [24-49](/area/24-49.md)
- [49-22](/area/49-22.md)
- [61-13](/area/61-13.md)
- [61-18](/area/61-18.md)
- [61-38](/area/61-38.md)
- [66-59](/area/66-59.md)
- [11-50](/area/11-50.md)
- [28-59](/area/28-59.md)

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Página: https://texas-water-wells.pages.dev/area/57-12/
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