# Well grid 66-11, Texas — Colorado, Fayette — how deep, and through what

> 245 well reports in Texas state well grid 66-11, covering Colorado, Fayette, Austin. Median depth 200 ft.

## Texas well grid 66-11

A 7.5-minute quadrangle of the Texas state well grid, mostly in [Colorado County](/county/colorado.md) and [Fayette County](/county/fayette.md). **245** reports, median depth **200 ft**.

### What you will drill through in grid 66-11

*Logged in state well grid 66-11, by depth. The figure is how many wells hit it.*

| Depth, ft | What was logged there |
|---|---|
| 0–25 ft | **Clay** 28 , **Topsoil** 32 , **Top Soil** 29 , **Red Clay** 21 , **Sand** 21 , **Yellow Clay** 19 |
| 25–50 ft | **Sand** 21 , **Rock** 14 , **Clay** 9 , **Tan Clay** 11 , **Sand & Rock** 6 , **Sand & Gravel** 5 |
| 50–100 ft | **Sand** 39 , **Tan Clay** 15 , **Clay** 12 , **Rock** 11 , **Blue Clay** 11 , **White Clay** 7 |
| 100–200 ft | **Sand** 58 , **Blue Clay** 19 , **Rock** 16 , **Clay** 16 , **Tan Clay** 15 , **Shale** 11 |
| 200–300 ft | **Sand** 23 , **Rock** 14 , **Shale** 12 , **Mc Shale** 10 , **Clay** 10 , **Blue Clay** 8 |
| 300–500 ft | **Rock** 9 , **Shale** 9 , **Sand** 6 , **Sand & Rock Streaks** 3 , **Clay** 3 , **Clay & Rock** 3 |
| 500–1000 ft | **Clay** 6 , **Shale** 4 , **Sand** 7 , **Sandy Shale** 3 , **Rock Streaks** 1 , **White Shale** 1 |
| 1000–5000 ft | **Shale** 1 , **Sand** 1 , **Sandy** 1 , **Shale W/Scattered Sand** 1 |

### Who drills here

*Licensed firms in state well grid 66-11, busiest first.*

| Firm of record | Wells | Median depth, ft | Median yield, gpm | Years |
|---|---|---|---|---|
| [Neuendorff's Water Well Svc., Inc.](/driller/neuendorff-s-water-well-svc-inc.md) | 48 | 200 | 25 | 2003–2014 |
| [Neuendorff's Water Well Service, Inc.](/driller/neuendorff-s-water-well-service-inc.md) | 35 | 220 | 23 | 2014–2026 |
| [Envirotech Drilling Services LLC](/driller/envirotech-drilling-services-llc.md) | 19 | 10 | — | 2018–2026 |
| [Skutca Water Well](/driller/skutca-water-well.md) | 18 | 169 | 12 | 2001–2014 |
| [J&S WATER WELLS](/driller/j-s-water-wells.md) | 12 | 690 | 100 | 2008–2024 |
| [Busselman Water Wells, LLC](/driller/busselman-water-wells-llc.md) | 9 | 115 | 25 | 2023–2026 |
| [Maresh Drilling Co., Inc.](/driller/maresh-drilling-co-inc.md) | 9 | 240 | 15 | 2014–2026 |
| [Texas Southern Drilling](/driller/texas-southern-drilling.md) | 9 | 225 | 25 | 2022–2024 |
| [Jackson Water Well](/driller/jackson-water-well.md) | 7 | 200 | 10 | 2013–2024 |
| [Cobra Water Well Drilling, LLC.](/driller/cobra-water-well-drilling-llc.md) | 5 | 200 | 21 | 2018–2025 |
| [Diggs Drilling Co Inc](/driller/diggs-drilling-co-inc.md) | 5 | 195 | 20 | 2016 |
| [Washington County Water Well Drilling](/driller/washington-county-water-well-drilling.md) | 5 | 160 | 8 | 2004–2009 |
| [Rangnow Water Well Service](/driller/rangnow-water-well-service.md) | 4 | 230 | 35 | 2007–2009 |
| Stetson Water Well Drilling & Service | 4 | 65 | 12 | 2005 |
| [WASHINGTON CO WATER WELL DRILLING](/driller/washington-co-water-well-drilling.md) | 3 | 270 | 20 | 2015–2021 |
| [Vrana Well Service Inc.](/driller/vrana-well-service-inc.md) | 3 | 164 | 20 | 2015–2020 |
| [Richter Well Drilling, Inc.](/driller/richter-well-drilling-inc.md) | 3 | 420 | 30 | 2011–2016 |
| J D Diggs Drilling Co Inc | 3 | 370 | 50 | 2009–2014 |
| Fleck Water Well Drilling | 3 | 120 | 12 | 2008 |
| [Vaughn Water Well Service, Inc.](/driller/vaughn-water-well-service-inc.md) | 3 | — | 16 | 2008 |
| [A.W. Flentge Service](/driller/a-w-flentge-service.md) | 3 | 90 | 15 | 2005–2006 |
| [Russell Drilling Co., Inc.](/driller/russell-drilling-co-inc.md) | 2 | 1,406 | 60 | 2019–2021 |
| [B&R Water Well Service, LLC](/driller/b-r-water-well-service-llc.md) | 2 | 90 | 15 | 2017 |
| [Ball Drilling Company](/driller/ball-drilling-company.md) | 2 | 140 | 16 | 2012 |
| Fleck Water Well Drlg | 2 | 65 | 15 | 2011 |

### What the wells are for

*Purpose, and how deep each went.*

| Purpose | Wells | Share | Median depth, ft |
|---|---|---|---|
| Domestic | 179 | 73.1% | 204 |
| Environmental Soil Boring | 19 | 7.8% | 10 |
| Stock | 19 | 7.8% | 160 |
| Irrigation | 10 | 4.1% | 346 |
| Rig Supply | 7 | 2.9% | 690 |
| Public Supply | 5 | 2.0% | 740 |
| Other | 4 | 1.6% | 400 |
| Industrial | 2 | 0.8% | 111 |

*By decade drilled.*

| Decade | Reports | Median depth, ft | Water at, ft |
|---|---|---|---|
| 2000s | 80 | 175 | 68 |
| 2010s | 96 | 205 | 87 |
| 2020s | 69 | 200 | 91 |

### The deepest reports on file

*Deepest reports in state well grid 66-11. Column one is the tracking number.*

| Report | Year | Depth, ft | Water at, ft | Yield, gpm | Purpose |
|---|---|---|---|---|---|
| 530823 | 2019 | 1,406 | — | — | Public Supply |
| 137588 | 2008 | 856 | 39 | 50 | Public Supply |
| 427698 | 2016 | 850 | 90 | 80 | Domestic |
| 676283 | 2024 | 830 | 75 | 150 | Rig Supply |
| 276620 | 2011 | 812 | 102 | 100 | Domestic |
| 606989 | 2022 | 790 | 10 | 150 | Rig Supply |
| 402050 | 2015 | 780 | — | 100 | Irrigation |
| 577729 | 2021 | 740 | 156 | 60 | Public Supply |
| 478193 | 2018 | 715 | 161 | 25 | Domestic |
| 669101 | 2024 | 710 | 155 | 130 | Rig Supply |

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 66-11?

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 [Colorado County](/county/colorado.md), [Fayette County](/county/fayette.md), [Austin County](/county/austin.md), [Jackson County](/county/jackson.md).

### Grids with a comparable number of reports

- [24-31](/area/24-31.md)
- [24-46](/area/24-46.md)
- [83-36](/area/83-36.md)
- [02-39](/area/02-39.md)
- [84-15](/area/84-15.md)
- [12-02](/area/12-02.md)
- [35-47](/area/35-47.md)
- [66-47](/area/66-47.md)
- [80-03](/area/80-03.md)
- [38-19](/area/38-19.md)
- [45-04](/area/45-04.md)
- [58-28](/area/58-28.md)
- [59-28](/area/59-28.md)

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Página: https://texas-water-wells.pages.dev/area/66-11/
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