Texas well grid 78-11
A 7.5-minute quadrangle of the Texas state well grid, mostly in Atascosa County and Karnes County. 140 reports, median depth 385 ft.
140Reports
385 ftMedian depth
170 ftWater at
60 gpmMedian yield
What you will drill through in grid 78-11
| Depth, ft | What was logged there |
|---|---|
| 0–25 ft | Top Soil 41, Shale 13, Tan Clay 16, Surface 13, Clay 11, Sandy Clay 9 |
| 25–50 ft | Grey Clay 6, Rock 4, Tan Clay 4, Shale 3, Brown Clay 2, Clay 2 |
| 50–100 ft | Shale 14, Rock 14, Gray Clay 10, Sand 7, Grey Shale 6, Grey Clay 5 |
| 100–200 ft | Rock 16, Sand 25, Shale 17, Grey Shale 7, Gray Sand 5, Gray Clay 5 |
| 200–300 ft | Sand 23, Shale 22, Rock 17, Grey Shale 6, Gray Clay 5, Sandy Shale 5 |
| 300–500 ft | Sand 30, Shale 23, Rock 11, Sandy Shale 8, Gray Clay 6, Shale / Td 4 |
| 500–1000 ft | Sand 10, Shale 6, Sandy Shale 4, Rock 3, Shale / Td 2, Shale / Sand Streaks 1 |
| 1000–5000 ft | Shale 5, Sand 3, Carrizo Sand 3, Hard Shale 2, Carrizo Formation 2, Sand/Shale 1 |
Who drills here
What the wells are for
| Purpose | Wells | Share | Median depth, ft |
|---|---|---|---|
| Domestic | 68 | 48.6% | 400 |
| Environmental Soil Boring | 29 | 20.7% | 18 |
| Stock | 21 | 15.0% | 360 |
| Irrigation | 9 | 6.4% | 2,036 |
| Rig Supply | 6 | 4.3% | 395 |
| Monitor | 3 | 2.1% | 35 |
| Industrial | 2 | 1.4% | 560 |
| Fracking Supply | 2 | 1.4% | 1,754 |
| Decade | Reports | Median depth, ft | Water at, ft |
|---|---|---|---|
| 2000s | 25 | 410 | 158 |
| 2010s | 66 | 345 | 165 |
| 2020s | 49 | 390 | 183 |
The deepest reports on file
| Report | Year | Depth, ft | Water at, ft | Yield, gpm | Purpose |
|---|---|---|---|---|---|
| 281117 | 2011 | 3,120 | 82 | 300 | Rig Supply |
| 389605 | 2015 | 2,641 | 244 | — | Rig Supply |
| 282702 | 2011 | 2,523 | 200 | 1,500 | Irrigation |
| 380321 | 2013 | 2,425 | 263 | 1,300 | Irrigation |
| 196609 | 2009 | 2,255 | 220 | 1,500 | Irrigation |
| 95821 | 2006 | 2,110 | 190 | 150 | Domestic |
| 622300 | 2022 | 2,036 | 288 | 800 | Irrigation |
| 285804 | 2012 | 1,754 | 135 | — | Fracking Supply |
| 196670 | 2009 | 1,554 | 220 | 1,400 | Irrigation |
| 729424 | 2026 | 1,521 | 259 | — | Irrigation |
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 78-11?
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.
This grid falls in Atascosa County, Karnes County.