Texas well grid 21-36
A 7.5-minute quadrangle of the Texas state well grid, mostly in Knox County and Callahan County. 160 reports, median depth 61 ft.
160Reports
61 ftMedian depth
34 ftWater at
120 gpmMedian yield
What you will drill through in grid 21-36
| Depth, ft | What was logged there |
|---|---|
| 0–25 ft | White Sandy Clay 45, Top Soil 32, Red Sandy Clay 24, Brown Clay 15, Caliche 15, Grey Clay 14 |
| 25–50 ft | Coarse H2O Sand 25, Red Bed 18, Good Gravel 15, Red Clay Streak 12, Sand Rock 11, Red Clay 10 |
| 50–100 ft | Red Bed 25, Red Bed & Blue Shale 22, Red Bed & Blue Shell 11, Good Gravel 5, Red Clay 4, Red Clay Streak 4 |
Who drills here
| Firm of record | Wells | Median depth, ft | Median yield, gpm | Years |
|---|---|---|---|---|
| LEONARD DRILLING LLC | 106 | 62 | 125 | 2003–2026 |
| Talon Drilling, LP | 20 | 40 | — | 2002–2004 |
| JB Drilling | 12 | 55 | — | 2022–2024 |
| Gillispie Drilling | 5 | 32 | 15 | 2005–2023 |
| WEST Drilling | 3 | 50 | — | 2018 |
| Presage Environmental, Inc. | 2 | 45 | — | 2011 |
| E&C DRILLING CO. | 1 | 60 | 2 | 2017 |
| LEONARD WATER SERVICES | 1 | 58 | 50 | 2016 |
| Diversified Water Well Drilling | 1 | 70 | 10 | 2010 |
| SCI | 1 | 32 | — | 2005 |
| CM2, Inc. | 1 | 6 | — | 2003 |
What the wells are for
| Purpose | Wells | Share | Median depth, ft |
|---|---|---|---|
| Irrigation | 89 | 55.6% | 62 |
| Monitor | 26 | 16.2% | 40 |
| Domestic | 25 | 15.6% | 60 |
| Stock | 16 | 10.0% | 60 |
| Industrial | 2 | 1.2% | 70 |
| Public Supply | 1 | 0.6% | 58 |
| Environmental Soil Boring | 1 | 0.6% | 6 |
| Decade | Reports | Median depth, ft | Water at, ft |
|---|---|---|---|
| 2000s | 64 | 60 | 32 |
| 2010s | 66 | 65 | 36 |
| 2020s | 30 | 57 | 32 |
The deepest reports on file
| Report | Year | Depth, ft | Water at, ft | Yield, gpm | Purpose |
|---|---|---|---|---|---|
| 557960 | 2020 | 82 | 52 | 25 | Domestic |
| 350257 | 2013 | 82 | 40 | — | Stock |
| 327329 | 2012 | 77 | 58 | 50 | Irrigation |
| 200764 | 2007 | 75 | 44 | 350 | Irrigation |
| 349268 | 2013 | 74 | 48 | 20 | Domestic |
| 330954 | 2012 | 74 | 50 | 160 | Irrigation |
| 330946 | 2012 | 73 | 46 | 230 | Irrigation |
| 494130 | 2017 | 71 | 46 | — | Stock |
| 337190 | 2013 | 71 | 36 | — | Domestic |
| 264783 | 2009 | 71 | 41 | 30 | 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 21-36?
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 Knox County, Callahan County, Baylor County.