Texas well grid 80-20
A 7.5-minute quadrangle of the Texas state well grid, mostly in Calhoun County and Jackson County. 510 reports, median depth 24 ft.
510Reports
24 ftMedian depth
13 ftWater at
60 gpmMedian yield
What you will drill through in grid 80-20
| Depth, ft | What was logged there |
|---|---|
| 0–25 ft | Silty Clay 18, Silty Clay, Reddish Brown 22, Fat Clay 21, No Recovery 27, -Cl- Silty Clay: Reddish Brown, Very Stiff, With Gray Mottli 16, -Concrete- Concrete 19 |
| 25–50 ft | Silty Sandy Clay,Reddish Brw.,Moist 13, Silty Clay 7, Grey Clay 9, Fat Clay 8, Sand 7, Sandy Clay 5 |
| 50–100 ft | Sand 11, Fat Clay 5, Brown Clay 5, Reddish Brown Clay 5, Grey Sandy Clay 5, Red Clay 4 |
| 100–200 ft | Sand 9, Clay 7, Gray Clay 4, Grey Sandy Clay 3, Grey Sand 2, Grey Clay 3 |
| 200–300 ft | Sand 4, Clay 5, Coarse Sand 4, Gray Clay 2, Sand And Gravel 1, Clay& Shell 1 |
| 300–500 ft | Sand 4, Clay 2, Course Sand 2, Clay Td 1, Blue Clay 1, Coarse Sand 1 |
| 500–1000 ft | Clay 1, Sand 1, Sand Fine 1 |
| 1000–5000 ft | Sand With Very Little Clay 1 |
Who drills here
| Firm of record | Wells | Median depth, ft | Median yield, gpm | Years |
|---|---|---|---|---|
| Vortex Drilling, Inc. | 177 | 22 | — | 2008–2018 |
| Vortex Drilling Partners, LP | 106 | 15 | — | 2019–2022 |
| Envirotech Drilling Services LLC | 77 | 25 | — | 2023–2024 |
| BEST DRILLING SERVICES, INC. | 64 | 22 | — | 2004–2025 |
| Cascade Drilling | 24 | 85 | — | 2025 |
| Lewis Environmental Drilling, Inc. | 18 | 47 | — | 2013 |
| Gainco, Inc. | 15 | 20 | — | 2014 |
| WALKER HILL ENVIRONMENTAL INC | 13 | — | — | 2012 |
| Joe Ferguson Water Well Drilling, Inc. | 4 | 305 | — | 2012–2016 |
| Cady's Water wells | 3 | 345 | 50 | 2007–2008 |
| Cady Water Wells | 2 | 120 | 30 | 2006 |
| Finch Water Well | 1 | 510 | 60 | 2019 |
| Critendon Drilling Service, Inc. | 1 | 222 | 150 | 2018 |
| Felder Water Well & Pump Service, LLC | 1 | 612 | 150 | 2012 |
| Evans Drilling | 1 | 1,400 | 160 | 2011 |
| Burleson Services, Inc. | 1 | 400 | 100 | 2004 |
| Joe Ferguson Drilling, Inc. | 1 | 450 | — | 2005 |
| J.C. Thompson Water Well Serv. | 1 | 270 | 60 | 2003 |
What the wells are for
| Purpose | Wells | Share | Median depth, ft |
|---|---|---|---|
| Monitor | 247 | 48.4% | 25 |
| Environmental Soil Boring | 227 | 44.5% | 20 |
| Other | 20 | 3.9% | 25 |
| Domestic | 7 | 1.4% | 315 |
| Rig Supply | 7 | 1.4% | 305 |
| Irrigation | 1 | 0.2% | 612 |
| Stock | 1 | 0.2% | 450 |
| Decade | Reports | Median depth, ft | Water at, ft |
|---|---|---|---|
| 2000s | 82 | 25 | 28 |
| 2010s | 208 | 24 | 12 |
| 2020s | 220 | 22 | 13 |
The deepest reports on file
| Report | Year | Depth, ft | Water at, ft | Yield, gpm | Purpose |
|---|---|---|---|---|---|
| 249003 | 2011 | 1,400 | 12 | 160 | Rig Supply |
| 308927 | 2012 | 612 | 58 | 150 | Irrigation |
| 526605 | 2019 | 510 | 65 | 60 | Domestic |
| 149523 | 2005 | 450 | — | — | Stock |
| 702364 | 2025 | 445 | — | — | Monitor |
| 179425 | 2004 | 400 | 60 | 100 | Rig Supply |
| 147544 | 2008 | 350 | 28 | 50 | Domestic |
| 148370 | 2008 | 345 | 28 | — | Domestic |
| 372456 | 2014 | 320 | — | — | Rig Supply |
| 114094 | 2007 | 315 | 30 | 35 | 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 80-20?
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.
This grid falls in Calhoun County, Jackson County, Bexar County.