# Well grid 57-18, Texas — Llano — how deep, and through what

> 264 well reports in Texas state well grid 57-18, covering Llano. Median depth 150 ft.

## Texas well grid 57-18

A 7.5-minute quadrangle of the Texas state well grid, mostly in [Llano County](/county/llano.md). **264** reports, median depth **150 ft**.

### What you will drill through in grid 57-18

*Logged in state well grid 57-18, by depth. The figure is how many wells hit it.*

| Depth, ft | What was logged there |
|---|---|
| 0–25 ft | **Topsoil** 193 , **Red Granite** 52 , **Red Metamorphic** 38 , **Red & Black Metamorphic** 32 , **Red Sandy Clay** 30 , **Metamorphic Gravel & Clay** 24 |
| 25–50 ft | **Red & Black Metamorphic** 17 , **Red Granite** 8 , **Gray Granite** 6 , **Red Metamorphic** 5 , **Black And Red Granite** 3 , **Black Granite** 2 |
| 50–100 ft | **Red Granite** 17 , **Red Metamorphic** 11 , **Red & Black Metamorphic** 7 , **Gray Granite** 6 , **Gray & Red Metamorphic** 4 , **Black Granite** 3 |
| 100–200 ft | **Red Metamorphic** 11 , **Red & Black Metamorphic** 11 , **Red Granite** 6 , **Grey Granite** 4 , **Red & Gray Metamorphic** 5 , **Black Metamorphic** 4 |
| 200–300 ft | **Red Metamorphic** 4 , **Red Granite** 2 , **Black / Grey Granite** 1 , **Grey Granite** 1 , **Red Granite With Gray Shale** 1 , **Gray Granite** 1 |
| 300–500 ft | **Black Granite / Quartz** 1 , **Red Granite** 1 , **Grey Granite** 1 |

### Who drills here

*Licensed firms in state well grid 57-18, busiest first.*

| Firm of record | Wells | Median depth, ft | Median yield, gpm | Years |
|---|---|---|---|---|
| [Virdell Drilling Inc.](/driller/virdell-drilling-inc.md) | 115 | 140 | 12 | 2001–2018 |
| [Walden Drilling Inc](/driller/walden-drilling-inc.md) | 79 | 150 | 5 | 2010–2026 |
| [Magill Drilling & Water Well Service, LLC](/driller/magill-drilling-water-well-service-llc.md) | 33 | 165 | 6 | 2017–2026 |
| [Magill Drilling](/driller/magill-drilling.md) | 11 | 160 | 3 | 2015–2016 |
| [Bee Cave Drilling, Inc.](/driller/bee-cave-drilling-inc.md) | 7 | 240 | 7 | 2019–2023 |
| [Apex Drilling, Inc.](/driller/apex-drilling-inc.md) | 4 | 200 | 6 | 2007–2020 |
| [L & L Drilling Co.](/driller/l-l-drilling-co.md) | 4 | 205 | 45 | 2013–2014 |
| [Highland Drilling Inc.](/driller/highland-drilling-inc.md) | 4 | 200 | 4 | 2005–2009 |
| [Magill Well Service](/driller/magill-well-service.md) | 3 | 200 | 1 | 2015 |
| [Ashley Drilling & Well Service](/driller/ashley-drilling-well-service.md) | 2 | 100 | 15 | 2023 |
| brian Walden drilling | 1 | — | — | 2012 |
| [Western Water Wells](/driller/western-water-wells.md) | 1 | 125 | 2 | 2011 |

### What the wells are for

*Purpose, and how deep each went.*

| Purpose | Wells | Share | Median depth, ft |
|---|---|---|---|
| Domestic | 214 | 81.1% | 150 |
| Stock | 50 | 18.9% | 165 |

*By decade drilled.*

| Decade | Reports | Median depth, ft | Water at, ft |
|---|---|---|---|
| 2000s | 92 | 140 | 30 |
| 2010s | 96 | 160 | 42 |
| 2020s | 76 | 160 | 42 |

### The deepest reports on file

*Deepest reports in state well grid 57-18. Column one is the tracking number.*

| Report | Year | Depth, ft | Water at, ft | Yield, gpm | Purpose |
|---|---|---|---|---|---|
| 573943 | 2021 | 450 | 40 | — | Stock |
| 645552 | 2023 | 400 | 49 | — | Domestic |
| 486785 | 2018 | 350 | 43 | 4 | Domestic |
| 343593 | 2013 | 328 | — | — | Domestic |
| 1952 | 2001 | 310 | 93 | 27 | Domestic |
| 337174 | 2013 | 305 | 55 | 1 | Domestic |
| 21715 | 2003 | 300 | 25 | 11 | Domestic |
| 4006 | 2001 | 300 | 29 | 4 | Domestic |
| 3993 | 2001 | 300 | 30 | 11 | Domestic |
| 343587 | 2013 | 278 | 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 57-18?

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

- [58-11](/area/58-11.md)
- [64-17](/area/64-17.md)
- [29-35](/area/29-35.md)
- [35-51](/area/35-51.md)
- [68-09](/area/68-09.md)
- [83-17](/area/83-17.md)
- [07-64](/area/07-64.md)
- [57-29](/area/57-29.md)
- [57-33](/area/57-33.md)
- [61-53](/area/61-53.md)
- [67-55](/area/67-55.md)
- [35-28](/area/35-28.md)
- [57-43](/area/57-43.md)

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Página: https://texas-water-wells.pages.dev/area/57-18/
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