# Well grid 66-23, Texas — Austin, Colorado — how deep, and through what

> 269 well reports in Texas state well grid 66-23, covering Austin, Colorado, Harris. Median depth 170 ft.

## Texas well grid 66-23

A 7.5-minute quadrangle of the Texas state well grid, mostly in [Austin County](/county/austin.md) and [Colorado County](/county/colorado.md). **269** reports, median depth **170 ft**.

### What you will drill through in grid 66-23

*Logged in state well grid 66-23, by depth. The figure is how many wells hit it.*

| Depth, ft | What was logged there |
|---|---|
| 0–25 ft | **Clay** 68 , **Top Soil** 57 , **Red Clay** 39 , **Yellow Clay** 26 , **Sand** 23 , **Topsoil** 16 |
| 25–50 ft | **Sand** 55 , **Clay** 13 , **Tan Clay** 9 , **Red Clay** 7 , **Brown/Tan Clay** 6 , **Rock** 6 |
| 50–100 ft | **Sand** 77 , **Clay** 29 , **Rock** 17 , **Sandstone** 14 , **Clay & Rock** 9 , **Tan Clay** 7 |
| 100–200 ft | **Sand** 91 , **Clay** 45 , **Rock** 49 , **Tan Clay** 26 , **White Clay** 13 , **Sand & Rock** 6 |
| 200–300 ft | **Sand** 48 , **Clay** 20 , **Sandstone** 14 , **Rock & Sand** 7 , **Rock** 6 , **Tan Clay** 6 |
| 300–500 ft | **Clay** 6 , **Tan Clay** 3 , **Sand** 3 , **Rock** 2 , **Blue Clay** 1 , **Solid Rock** 1 |

### Who drills here

*Licensed firms in state well grid 66-23, busiest first.*

| Firm of record | Wells | Median depth, ft | Median yield, gpm | Years |
|---|---|---|---|---|
| [Texas Southern Drilling](/driller/texas-southern-drilling.md) | 39 | 125 | 40 | 2020–2025 |
| [Bluebonnet Water Wells](/driller/bluebonnet-water-wells.md) | 27 | 295 | 50 | 2024–2026 |
| [Burleson Services, Inc.](/driller/burleson-services-inc.md) | 20 | 200 | 95 | 2003–2008 |
| [Chaffin Water Well Service](/driller/chaffin-water-well-service.md) | 16 | 307 | 50 | 2021–2025 |
| [Neuendorff's Water Well Service, Inc.](/driller/neuendorff-s-water-well-service-inc.md) | 15 | 145 | 50 | 2016–2026 |
| [Terra Power Drilling LLC](/driller/terra-power-drilling-llc.md) | 14 | 130 | 40 | 2009–2018 |
| [Skutca Water Well](/driller/skutca-water-well.md) | 13 | 154 | 50 | 2003–2012 |
| [Bell's Drilling Service](/driller/bell-s-drilling-service.md) | 10 | 135 | 30 | 2022–2025 |
| [HEFLIN WATER WORKS](/driller/heflin-water-works.md) | 9 | 170 | 40 | 2005–2022 |
| [A.W. Flentge Service](/driller/a-w-flentge-service.md) | 8 | 105 | 20 | 2002–2018 |
| [Hatton Water Well Service](/driller/hatton-water-well-service.md) | 7 | 169 | 30 | 2021–2026 |
| [G.W.Davis Water Well Co LLC](/driller/g-w-davis-water-well-co-llc.md) | 7 | 300 | 60 | 2023–2024 |
| [Ricky Bonds Water Wells](/driller/ricky-bonds-water-wells.md) | 6 | 195 | 65 | 2006–2017 |
| [TIM FRANKS WATER WELL SERVICE](/driller/tim-franks-water-well-service.md) | 5 | 145 | 50 | 2023–2025 |
| [AQUA STAR LLC](/driller/aqua-star-llc.md) | 5 | 170 | 50 | 2018–2020 |
| [Leon Flentge Water Well Drilling](/driller/leon-flentge-water-well-drilling.md) | 5 | 240 | 80 | 2013–2018 |
| [Geophysical Drilling, Inc.](/driller/geophysical-drilling-inc.md) | 4 | 300 | 100 | 2006–2018 |
| [Scott Drilling Inc.](/driller/scott-drilling-inc.md) | 4 | 200 | 70 | 2005–2016 |
| [Leon Flentge Water Well Drilling and Service](/driller/leon-flentge-water-well-drilling-and-service.md) | 4 | 220 | 80 | 2007–2012 |
| [Neuendorff's Water Well Svc., Inc.](/driller/neuendorff-s-water-well-svc-inc.md) | 4 | 113 | 50 | 2004–2011 |
| [MARAL DRILLING](/driller/maral-drilling.md) | 3 | 160 | 25 | 2015–2023 |
| [Cobra Water Well Drilling, LLC.](/driller/cobra-water-well-drilling-llc.md) | 3 | 180 | 60 | 2013–2020 |
| [Ondrey Water Well Service](/driller/ondrey-water-well-service.md) | 3 | 245 | — | 2007–2016 |
| [Holly Water Wells](/driller/holly-water-wells.md) | 3 | 240 | 40 | 2013 |
| [Flentge Water Well Drilling and Service](/driller/flentge-water-well-drilling-and-service.md) | 3 | 190 | 60 | 2005–2006 |

### What the wells are for

*Purpose, and how deep each went.*

| Purpose | Wells | Share | Median depth, ft |
|---|---|---|---|
| Domestic | 228 | 84.8% | 165 |
| Rig Supply | 17 | 6.3% | 220 |
| Stock | 8 | 3.0% | 213 |
| Industrial | 8 | 3.0% | 200 |
| Irrigation | 3 | 1.1% | 330 |
| Monitor | 3 | 1.1% | 25 |
| Public Supply | 2 | 0.7% | 435 |

*By decade drilled.*

| Decade | Reports | Median depth, ft | Water at, ft |
|---|---|---|---|
| 2000s | 80 | 173 | 45 |
| 2010s | 52 | 185 | 45 |
| 2020s | 137 | 165 | 56 |

### The deepest reports on file

*Deepest reports in state well grid 66-23. Column one is the tracking number.*

| Report | Year | Depth, ft | Water at, ft | Yield, gpm | Purpose |
|---|---|---|---|---|---|
| 58692 | 2005 | 435 | 70 | 70 | Public Supply |
| 5442 | 2001 | 430 | 80 | 100 | Domestic |
| 180868 | 2009 | 400 | 35 | — | Irrigation |
| 346894 | 2013 | 330 | — | 600 | Irrigation |
| 676680 | 2024 | 315 | 71 | 70 | Domestic |
| 654660 | 2023 | 315 | 73 | 60 | Domestic |
| 698136 | 2025 | 310 | 84 | 50 | Domestic |
| 686952 | 2025 | 310 | 70 | 45 | Domestic |
| 682632 | 2024 | 310 | 70 | 50 | Domestic |
| 679457 | 2024 | 310 | 70 | 50 | 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 66-23?

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 [Austin County](/county/austin.md), [Colorado County](/county/colorado.md), [Harris County](/county/harris.md), [Fort Bend County](/county/fort-bend.md), [Wharton County](/county/wharton.md).

### Grids with a comparable number of reports

- [58-52](/area/58-52.md)
- [69-24](/area/69-24.md)
- [10-37](/area/10-37.md)
- [23-44](/area/23-44.md)
- [32-43](/area/32-43.md)
- [43-40](/area/43-40.md)
- [65-35](/area/65-35.md)
- [03-58](/area/03-58.md)
- [10-54](/area/10-54.md)
- [24-53](/area/24-53.md)
- [44-19](/area/44-19.md)
- [56-47](/area/56-47.md)
- [57-10](/area/57-10.md)

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Página: https://texas-water-wells.pages.dev/area/66-23/
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