# Well grid 66-18, Texas — Colorado, Fayette — how deep, and through what

> 319 well reports in Texas state well grid 66-18, covering Colorado, Fayette, Lavaca. Median depth 156 ft.

## Texas well grid 66-18

A 7.5-minute quadrangle of the Texas state well grid, mostly in [Colorado County](/county/colorado.md) and [Fayette County](/county/fayette.md). **319** reports, median depth **156 ft**.

### What you will drill through in grid 66-18

*Logged in state well grid 66-18, by depth. The figure is how many wells hit it.*

| Depth, ft | What was logged there |
|---|---|
| 0–25 ft | **Tan Clay** 49 , **Clay** 39 , **Top Soil** 31 , **Brown Top Soil** 26 , **Sand** 24 , **Yellow Clay** 19 |
| 25–50 ft | **Tan Clay** 30 , **Sand** 16 , **Clay** 14 , **Sandstone** 9 , **Blue Clay** 11 , **Brown Sand** 8 |
| 50–100 ft | **Tan Clay** 42 , **Clay** 25 , **Sand** 24 , **Tan Sand** 19 , **Rock** 13 , **Blue Clay** 16 |
| 100–200 ft | **Tan Clay** 37 , **Sand** 37 , **Clay** 34 , **Gray Sand** 13 , **Rock** 9 , **Blue Clay** 11 |
| 200–300 ft | **Sand** 14 , **Clay** 8 , **Rock** 5 , **Tan Clay** 7 , **Shale** 6 , **Gray Sand** 4 |
| 300–500 ft | **Sand** 9 , **Clay** 9 , **Shale** 3 , **Tan Clay** 3 , **Blue Clay** 3 , **Gray Sand W/ Shale** 2 |
| 500–1000 ft | **Sand & Pyrite** 1 , **Clay & Pyrite** 1 , **Sand** 1 , **Clay** 1 , **Hard Gray Shale** 1 , **Sand/Clay** 1 |
| 1000–5000 ft | **Gray Hard Shale** 1 , **Sandy,Clay,Pyrite** 1 , **Clay & Pyrite** 1 |

### Who drills here

*Licensed firms in state well grid 66-18, busiest first.*

| Firm of record | Wells | Median depth, ft | Median yield, gpm | Years |
|---|---|---|---|---|
| [Vrana Well Service Inc.](/driller/vrana-well-service-inc.md) | 102 | 125 | 20 | 2003–2026 |
| [Maresh Drilling Co., Inc.](/driller/maresh-drilling-co-inc.md) | 40 | 180 | 30 | 2002–2025 |
| [Neuendorff's Water Well Service, Inc.](/driller/neuendorff-s-water-well-service-inc.md) | 23 | 170 | 25 | 2015–2026 |
| [CHANDLER DRILLING INC](/driller/chandler-drilling-inc.md) | 21 | 150 | 20 | 2004–2023 |
| [Neuendorff's Water Well Svc., Inc.](/driller/neuendorff-s-water-well-svc-inc.md) | 19 | 130 | 25 | 2003–2013 |
| [Texas Southern Drilling](/driller/texas-southern-drilling.md) | 18 | 165 | 35 | 2021–2026 |
| [Friedel Drilling Company](/driller/friedel-drilling-company.md) | 13 | 320 | 40 | 2006–2024 |
| [Vrana Well Serv. Inc.](/driller/vrana-well-serv-inc.md) | 9 | 100 | 15 | 2003–2014 |
| [Rangnow Water Well Service](/driller/rangnow-water-well-service.md) | 7 | 140 | 35 | 2007–2009 |
| [WB Southern Drilling LLC](/driller/wb-southern-drilling-llc.md) | 6 | 200 | 35 | 2023–2025 |
| [Ball Drilling Company](/driller/ball-drilling-company.md) | 6 | 120 | 8 | 2012–2013 |
| [Busselman Water Wells, LLC](/driller/busselman-water-wells-llc.md) | 4 | 242 | 25 | 2023–2026 |
| [Lone Star Drlg & Pump Serv](/driller/lone-star-drlg-pump-serv.md) | 4 | 163 | 20 | 2013–2016 |
| [Richter Well Drilling, Inc.](/driller/richter-well-drilling-inc.md) | 4 | 220 | 70 | 2003–2010 |
| [Skutca Water Well](/driller/skutca-water-well.md) | 3 | 164 | 12 | 2007–2013 |
| [Vortex Drilling, Inc.](/driller/vortex-drilling-inc.md) | 3 | — | — | 2012 |
| W-5 water well service | 3 | 109 | 12 | 2012 |
| Vrana's Well Service Inc. | 3 | — | 35 | 2011–2012 |
| [Bluebonnet Water Wells](/driller/bluebonnet-water-wells.md) | 2 | 405 | 20 | 2024–2025 |
| [Cobra Water Well Drilling, LLC.](/driller/cobra-water-well-drilling-llc.md) | 2 | 130 | 80 | 2011–2013 |
| [Deharde Water Well Service](/driller/deharde-water-well-service.md) | 2 | 180 | 75 | 2011 |
| [Rangnow Water Well](/driller/rangnow-water-well.md) | 2 | 440 | 60 | 2009 |
| [AQUA STAR LLC](/driller/aqua-star-llc.md) | 1 | 176 | 4 | 2022 |
| [Main Stream Environmental](/driller/main-stream-environmental.md) | 1 | 140 | 40 | 2022 |
| Advanced Water Well Technologies | 1 | — | — | 2018 |

### What the wells are for

*Purpose, and how deep each went.*

| Purpose | Wells | Share | Median depth, ft |
|---|---|---|---|
| Domestic | 270 | 84.6% | 153 |
| Stock | 25 | 7.8% | 156 |
| Irrigation | 8 | 2.5% | 180 |
| Public Supply | 5 | 1.6% | 1,028 |
| Rig Supply | 3 | 0.9% | 240 |
| Environmental Soil Boring | 3 | 0.9% | — |
| Closed-Loop Geothermal | 2 | 0.6% | 250 |
| Other | 1 | 0.3% | 116 |

*By decade drilled.*

| Decade | Reports | Median depth, ft | Water at, ft |
|---|---|---|---|
| 2000s | 108 | 140 | 77 |
| 2010s | 117 | 160 | 80 |
| 2020s | 94 | 180 | 96 |

### The deepest reports on file

*Deepest reports in state well grid 66-18. Column one is the tracking number.*

| Report | Year | Depth, ft | Water at, ft | Yield, gpm | Purpose |
|---|---|---|---|---|---|
| 333067 | 2005 | 1,050 | 210 | 205 | Public Supply |
| 88198 | 2006 | 1,028 | 224 | 501 | Public Supply |
| 427584 | 2016 | 1,000 | 243 | 302 | Public Supply |
| 364303 | 2014 | 570 | 100 | 90 | Irrigation |
| 249009 | 2010 | 563 | 144 | 100 | Domestic |
| 378343 | 2014 | 525 | 62 | 20 | Domestic |
| 100054 | 2006 | 520 | 30 | 100 | Domestic |
| 21976 | 2003 | 513 | 195 | 80 | Irrigation |
| 332977 | 2004 | 490 | 120 | 60 | Industrial |
| 637247 | 2023 | 483 | 188 | 115 | 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 66-18?

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 [Colorado County](/county/colorado.md), [Fayette County](/county/fayette.md), [Lavaca County](/county/lavaca.md), [Fort Bend County](/county/fort-bend.md).

### Grids with a comparable number of reports

- [68-01](/area/68-01.md)
- [79-10](/area/79-10.md)
- [24-63](/area/24-63.md)
- [44-35](/area/44-35.md)
- [35-41](/area/35-41.md)
- [59-45](/area/59-45.md)
- [35-38](/area/35-38.md)
- [59-37](/area/59-37.md)
- [79-07](/area/79-07.md)
- [02-40](/area/02-40.md)
- [65-44](/area/65-44.md)
- [79-60](/area/79-60.md)
- [59-46](/area/59-46.md)

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Página: https://texas-water-wells.pages.dev/area/66-18/
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