# Well grid 57-20, Texas — Llano — how deep, and through what

> 174 well reports in Texas state well grid 57-20, covering Llano. Median depth 200 ft.

## Texas well grid 57-20

A 7.5-minute quadrangle of the Texas state well grid, mostly in [Llano County](/county/llano.md). **174** reports, median depth **200 ft**.

### What you will drill through in grid 57-20

*Logged in state well grid 57-20, by depth. The figure is how many wells hit it.*

| Depth, ft | What was logged there |
|---|---|
| 0–25 ft | **Topsoil** 109 , **Granite Gravel** 19 , **Top Soil** 17 , **Red Granite** 14 , **Metamorphic Gravel & Clay** 12 , **Brown Clay & Gravel** 11 |
| 25–50 ft | **Red Granite** 4 , **Black Metamorphic** 4 , **Black And Red Granite** 3 , **Black Granite** 3 , **Gray & Red Metamorphic** 3 , **Granite** 2 |
| 50–100 ft | **Brown Sandstone** 4 , **Black Granite** 4 , **Red Metamorphic** 4 , **Black & Red Metamorphic** 3 , **Black Metamorphic** 3 , **Water Trace** 2 |
| 100–200 ft | **Black Metamorphic** 6 , **Gray Granite** 5 , **Black Granite** 3 , **Red Granite** 4 , **Pink Granite** 3 , **Red Sandstone** 2 |
| 200–300 ft | **Red Granite** 5 , **Red & Black Metamorphic** 2 , **Black Metamorphic** 2 , **Black & White Limestone** 1 , **Gray Granite** 2 , **White Sandstone** 1 |
| 300–500 ft | **Red Sandstone** 4 , **Gray Black Granite** 2 , **Black Granite** 1 , **White Sand** 1 , **Red Granite** 1 , **Pink / Black Granite 3-4 Gpm** 1 |
| 500–1000 ft | **Gray Sandstone** 1 , **Red Granite** 1 , **Gray Limestone** 1 , **Brown Sandstone** 1 , **Dark Brown Sandstone** 1 , **White Sandstone** 1 |

### Who drills here

*Licensed firms in state well grid 57-20, busiest first.*

| Firm of record | Wells | Median depth, ft | Median yield, gpm | Years |
|---|---|---|---|---|
| [Virdell Drilling Inc.](/driller/virdell-drilling-inc.md) | 60 | 200 | 8 | 2001–2019 |
| [Walden Drilling Inc](/driller/walden-drilling-inc.md) | 29 | 200 | 3 | 2014–2026 |
| [Magill Drilling & Water Well Service, LLC](/driller/magill-drilling-water-well-service-llc.md) | 25 | 225 | 5 | 2017–2024 |
| [Apex Drilling, Inc.](/driller/apex-drilling-inc.md) | 19 | 200 | 15 | 2004–2025 |
| [Highland Drilling Inc.](/driller/highland-drilling-inc.md) | 14 | 180 | 12 | 2003–2011 |
| [L & L Drilling Co.](/driller/l-l-drilling-co.md) | 12 | 304 | 16 | 2004–2019 |
| [Bee Cave Drilling, Inc.](/driller/bee-cave-drilling-inc.md) | 9 | 278 | 5 | 2003–2023 |
| [Western Water Wells](/driller/western-water-wells.md) | 3 | 190 | — | 2006–2023 |
| [Texan Water](/driller/texan-water.md) | 2 | 300 | — | 2020 |
| [J and J Water Wells](/driller/j-and-j-water-wells.md) | 1 | 225 | — | 2025 |

### What the wells are for

*Purpose, and how deep each went.*

| Purpose | Wells | Share | Median depth, ft |
|---|---|---|---|
| Domestic | 123 | 70.7% | 200 |
| Stock | 48 | 27.6% | 200 |
| Unknown | 2 | 1.1% | 250 |
| Test Well | 1 | 0.6% | 400 |

*By decade drilled.*

| Decade | Reports | Median depth, ft | Water at, ft |
|---|---|---|---|
| 2000s | 64 | 200 | 35 |
| 2010s | 63 | 200 | 52 |
| 2020s | 47 | 240 | 50 |

### The deepest reports on file

*Deepest reports in state well grid 57-20. Column one is the tracking number.*

| Report | Year | Depth, ft | Water at, ft | Yield, gpm | Purpose |
|---|---|---|---|---|---|
| 172077 | 2009 | 705 | 320 | 16 | Domestic |
| 105996 | 2007 | 600 | — | — | Domestic |
| 603027 | 2022 | 550 | — | — | Domestic |
| 487747 | 2018 | 550 | — | 6 | Stock |
| 48023 | 2004 | 484 | 39 | 1 | Domestic |
| 684917 | 2024 | 465 | 106 | 15 | Domestic |
| 172072 | 2009 | 460 | 42 | 30 | Domestic |
| 16953 | 2003 | 450 | 315 | 20 | Domestic |
| 48033 | 2004 | 423 | 81 | 8 | Domestic |
| 663089 | 2024 | 400 | 200 | — | Stock |

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 57-20?

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

- [21-49](/area/21-49.md)
- [27-55](/area/27-55.md)
- [31-53](/area/31-53.md)
- [33-43](/area/33-43.md)
- [37-05](/area/37-05.md)
- [39-37](/area/39-37.md)
- [45-16](/area/45-16.md)
- [80-36](/area/80-36.md)
- [02-59](/area/02-59.md)
- [05-40](/area/05-40.md)
- [34-44](/area/34-44.md)
- [35-43](/area/35-43.md)
- [37-30](/area/37-30.md)

---

Página: https://texas-water-wells.pages.dev/area/57-20/
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