# Well grid 57-17, Texas — Llano, Mason — how deep, and through what

> 295 well reports in Texas state well grid 57-17, covering Llano, Mason, Gillespie. Median depth 178 ft.

## Texas well grid 57-17

A 7.5-minute quadrangle of the Texas state well grid, mostly in [Llano County](/county/llano.md) and [Mason County](/county/mason.md). **295** reports, median depth **178 ft**.

### What you will drill through in grid 57-17

*Logged in state well grid 57-17, by depth. The figure is how many wells hit it.*

| Depth, ft | What was logged there |
|---|---|
| 0–25 ft | **Topsoil** 243 , **Red Sandy Clay** 69 , **Red Granite** 58 , **Red Metamorphic** 32 , **Brown Clay & Gravel** 29 , **Red & Black Metamorphic** 25 |
| 25–50 ft | **Red & Black Metamorphic** 21 , **Red Granite** 14 , **Red Metamorphic** 8 , **Red And Gray Granite** 6 , **Gray Granite** 6 , **Red & Gray Metamorphic** 4 |
| 50–100 ft | **Red Granite** 10 , **Gray Granite** 9 , **Red & Black Metamorphic** 8 , **Red Metamorphic** 8 , **Grey Granite** 3 , **Gray Decomposed Granite** 1 |
| 100–200 ft | **Red Metamorphic** 13 , **Red Granite** 4 , **Gray Granite** 5 , **Grey Granite** 3 , **Red & Black Metamorphic** 3 , **Red & Gray Metamorphic** 3 |
| 200–300 ft | **Red Granite** 3 , **Gray Granite** 2 , **Gray & Red Metamorphic** 2 , **1.5 Gpm** 1 , **1 Gpm** 1 , **Brown & Red Granite With White Quartz** 1 |
| 300–500 ft | **Red Granite** 2 , **Water** 1 , **Red & Brown Granite** 1 , **Red & Black Metamorphic** 1 |

### Who drills here

*Licensed firms in state well grid 57-17, busiest first.*

| Firm of record | Wells | Median depth, ft | Median yield, gpm | Years |
|---|---|---|---|---|
| [Virdell Drilling Inc.](/driller/virdell-drilling-inc.md) | 121 | 160 | 8 | 2001–2018 |
| [Magill Drilling & Water Well Service, LLC](/driller/magill-drilling-water-well-service-llc.md) | 80 | 175 | 7 | 2017–2026 |
| [Walden Drilling Inc](/driller/walden-drilling-inc.md) | 64 | 180 | 5 | 2010–2025 |
| [Magill Drilling](/driller/magill-drilling.md) | 6 | 198 | 21 | 2015–2016 |
| [Highland Drilling Inc.](/driller/highland-drilling-inc.md) | 5 | 180 | 20 | 2007–2009 |
| [L & L Drilling Co.](/driller/l-l-drilling-co.md) | 4 | 505 | 5 | 2016–2026 |
| [Magill Well Service](/driller/magill-well-service.md) | 4 | 180 | 3 | 2003–2015 |
| brian Walden drilling | 4 | 127 | — | 2011 |
| [Ashley Drilling & Well Service](/driller/ashley-drilling-well-service.md) | 2 | 160 | — | 2026 |
| [Louis Bergmann & Sons](/driller/louis-bergmann-sons.md) | 1 | 150 | — | 2024 |
| [Texan Water](/driller/texan-water.md) | 1 | 196 | 5 | 2024 |
| [aquatech solutions](/driller/aquatech-solutions.md) | 1 | 160 | 5 | 2023 |
| Magill Drilling & Well Service | 1 | 200 | 4 | 2015 |
| [Apex Drilling, Inc.](/driller/apex-drilling-inc.md) | 1 | — | 36 | 2011 |

### What the wells are for

*Purpose, and how deep each went.*

| Purpose | Wells | Share | Median depth, ft |
|---|---|---|---|
| Domestic | 239 | 81.0% | 160 |
| Stock | 56 | 19.0% | 200 |

*By decade drilled.*

| Decade | Reports | Median depth, ft | Water at, ft |
|---|---|---|---|
| 2000s | 92 | 150 | 30 |
| 2010s | 104 | 180 | 40 |
| 2020s | 99 | 180 | 50 |

### The deepest reports on file

*Deepest reports in state well grid 57-17. Column one is the tracking number.*

| Report | Year | Depth, ft | Water at, ft | Yield, gpm | Purpose |
|---|---|---|---|---|---|
| 416595 | 2016 | 505 | 50 | 3 | Domestic |
| 416594 | 2016 | 505 | 51 | 2 | Domestic |
| 291136 | 2012 | 500 | — | — | Domestic |
| 227302 | 2010 | 500 | 1 | 1 | Domestic |
| 730319 | 2026 | 405 | 50 | 8 | Domestic |
| 91514 | 2006 | 400 | — | 2 | Domestic |
| 665707 | 2024 | 360 | — | — | Stock |
| 110405 | 2007 | 340 | 28 | 2 | Domestic |
| 226246 | 2010 | 320 | 20 | 1 | Domestic |
| 684018 | 2024 | 305 | — | — | 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 57-17?

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), [Mason County](/county/mason.md), [Gillespie County](/county/gillespie.md).

### Grids with a comparable number of reports

- [24-58](/area/24-58.md)
- [29-37](/area/29-37.md)
- [33-61](/area/33-61.md)
- [40-61](/area/40-61.md)
- [67-04](/area/67-04.md)
- [18-64](/area/18-64.md)
- [43-31](/area/43-31.md)
- [67-41](/area/67-41.md)
- [67-46](/area/67-46.md)
- [28-42](/area/28-42.md)
- [57-62](/area/57-62.md)
- [02-48](/area/02-48.md)
- [27-16](/area/27-16.md)

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Página: https://texas-water-wells.pages.dev/area/57-17/
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