# Well grid 18-51, Texas — Collin — how deep, and through what

> 376 well reports in Texas state well grid 18-51, covering Collin. Median depth 20 ft.

## Texas well grid 18-51

A 7.5-minute quadrangle of the Texas state well grid, mostly in [Collin County](/county/collin.md). **376** reports, median depth **20 ft**.

### What you will drill through in grid 18-51

*Logged in state well grid 18-51, by depth. The figure is how many wells hit it.*

| Depth, ft | What was logged there |
|---|---|
| 0–25 ft | **Concrete** 31 , **Tan Clay** 30 , **Clay** 29 , **Brown Clay** 27 , **Gray Limestone** 23 , **Topsoil** 23 |
| 25–50 ft | **Gray Shale** 10 , **Tan Clay** 6 , **Gray Limestone** 2 , **Shale** 2 , **Limestone & Gray Shale** 1 , **Light Gray/ Cream Chalk** 1 |
| 50–100 ft | **Gray Shale** 3 , **Clay Shale** 1 , **Gray Clay** 1 , **Gray Shale W/ Sand Strks** 1 , **Gray Shale/Lime** 1 , **Shale** 1 |
| 100–200 ft | **Gray Shale** 3 , **Clay And Limestone** 1 , **Gray Clay** 1 , **Gray Clay And Limestone** 1 , **Grey Shale And Lime** 1 , **Clay/Lime** 1 |
| 200–300 ft | **Gray Shale** 21 , **Shale** 5 , **Black Soil** 5 , **Gray Clay** 1 , **Gray Clay And Sand** 1 , **Eagleford Shale** 1 |
| 300–500 ft | **Gray Shale** 4 , **Shale** 1 , **Blue Clay** 1 , **Clay** 1 , **Soft Shale** 1 , **Sandy Shale** 1 |
| 500–1000 ft | **Sand** 27 , **Shale** 14 , **Gray Shale** 12 , **Sandy Gray Shale** 6 , **Gray Shale/Sand** 9 , **Red Clay** 4 |
| 1000–5000 ft | **Sand** 29 , **Shale** 21 , **Gray Shale** 12 , **Limestone** 6 , **Sand And Shale** 4 , **Sand W/ Shale Strks** 2 |

### Who drills here

*Licensed firms in state well grid 18-51, busiest first.*

| Firm of record | Wells | Median depth, ft | Median yield, gpm | Years |
|---|---|---|---|---|
| [MagnaCore Drilling & Environmental Services](/driller/magnacore-drilling-environmental-services.md) | 78 | 10 | — | 2003–2016 |
| [Total Support Services](/driller/total-support-services.md) | 36 | 12 | — | 2002–2007 |
| [Earth Tech](/driller/earth-tech.md) | 24 | 975 | 27 | 2005–2020 |
| [WEST Drilling](/driller/west-drilling.md) | 17 | 19 | — | 2016–2020 |
| [Vortex Drilling, Inc.](/driller/vortex-drilling-inc.md) | 16 | 10 | — | 2007–2016 |
| [Groundwater Monitoring Inc.](/driller/groundwater-monitoring-inc.md) | 16 | 20 | — | 2004–2007 |
| [Texplor of Dallas, Inc.](/driller/texplor-of-dallas-inc.md) | 14 | 15 | — | 2006–2010 |
| [SCI](/driller/sci.md) | 13 | 22 | — | 2004–2009 |
| [Environmental Logistics Company, LLC](/driller/environmental-logistics-company-llc.md) | 12 | 20 | — | 2017–2024 |
| [Roddy Qualls Environmental Drilling](/driller/roddy-qualls-environmental-drilling.md) | 12 | 18 | — | 2015–2016 |
| Ground to Sprinkler | 12 | 980 | 20 | 2006–2007 |
| [Johnson Drilling, Inc.](/driller/johnson-drilling-inc.md) | 11 | 500 | — | 2003–2022 |
| [Strata Core Services, LLC](/driller/strata-core-services-llc.md) | 11 | 14 | — | 2011–2016 |
| [Sunbelt Industrial Services](/driller/sunbelt-industrial-services.md) | 10 | 17 | — | 2009–2023 |
| [A.L. Moser Drilling, Inc.](/driller/a-l-moser-drilling-inc.md) | 9 | 1,200 | 20 | 2004–2008 |
| [Double D Drilling](/driller/double-d-drilling.md) | 7 | 1,175 | 24 | 2012–2021 |
| [Barco Well Service, LP](/driller/barco-well-service-lp.md) | 7 | 1,120 | 50 | 2016–2021 |
| [qualls drilling](/driller/qualls-drilling.md) | 7 | 25 | — | 2014 |
| Excel Geothermal AC and Heat LLC | 5 | 300 | — | 2026 |
| [THI WATER WELL](/driller/thi-water-well.md) | 5 | 2,000 | 185 | 2014–2025 |
| [W.E.S.T. Drilling](/driller/w-e-s-t-drilling.md) | 4 | 25 | — | 2004–2012 |
| [Reed Engineering Group, Ltd.](/driller/reed-engineering-group-ltd.md) | 4 | 32 | — | 2004–2012 |
| [RIOMAR ENVIRONMENTAL DRILLING](/driller/riomar-environmental-drilling.md) | 4 | 7 | — | 2012 |
| [PSI](/driller/psi.md) | 4 | 12 | — | 2006 |
| [Michael Tolle](/driller/michael-tolle.md) | 3 | 300 | — | 2011–2020 |

### What the wells are for

*Purpose, and how deep each went.*

| Purpose | Wells | Share | Median depth, ft |
|---|---|---|---|
| Monitor | 136 | 36.2% | 20 |
| Environmental Soil Boring | 134 | 35.6% | 9 |
| Irrigation | 46 | 12.2% | 1,130 |
| Closed-Loop Geothermal | 31 | 8.2% | 300 |
| Stock | 16 | 4.3% | 1,160 |
| Domestic | 5 | 1.3% | 1,120 |
| Public Supply | 4 | 1.1% | 1,944 |
| Injection | 3 | 0.8% | — |

*By decade drilled.*

| Decade | Reports | Median depth, ft | Water at, ft |
|---|---|---|---|
| 2000s | 212 | 15 | 476 |
| 2010s | 125 | 20 | 541 |
| 2020s | 39 | 300 | 578 |

### The deepest reports on file

*Deepest reports in state well grid 18-51. Column one is the tracking number.*

| Report | Year | Depth, ft | Water at, ft | Yield, gpm | Purpose |
|---|---|---|---|---|---|
| 25128 | 2003 | 3,200 | 505 | 1,160 | Irrigation |
| 252730 | 2008 | 3,105 | 600 | 403 | Public Supply |
| 715222 | 2025 | 2,260 | — | 200 | Irrigation |
| 577500 | 2021 | 2,000 | 877 | 185 | Irrigation |
| 516549 | 2019 | 2,000 | — | — | Stock |
| 712777 | 2024 | 1,944 | — | — | Public Supply |
| 267332 | 2011 | 1,936 | 800 | 150 | Stock |
| 662040 | 2024 | 1,900 | 769 | — | Irrigation |
| 497370 | 2018 | 1,900 | — | — | Irrigation |
| 549759 | 2020 | 1,858 | 770 | 420 | Public 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 18-51?

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 [Collin County](/county/collin.md).

### Grids with a comparable number of reports

- [66-20](/area/66-20.md)
- [02-61](/area/02-61.md)
- [81-04](/area/81-04.md)
- [35-37](/area/35-37.md)
- [65-62](/area/65-62.md)
- [66-40](/area/66-40.md)
- [79-03](/area/79-03.md)
- [79-58](/area/79-58.md)
- [79-46](/area/79-46.md)
- [27-56](/area/27-56.md)
- [28-27](/area/28-27.md)
- [61-57](/area/61-57.md)
- [68-06](/area/68-06.md)

---

Página: https://texas-water-wells.pages.dev/area/18-51/
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