Texas well grid 66-40
A 7.5-minute quadrangle of the Texas state well grid, mostly in Wharton County and Fort Bend County. 377 reports, median depth 205 ft.
377Reports
205 ftMedian depth
49 ftWater at
60 gpmMedian yield
What you will drill through in grid 66-40
| Depth, ft | What was logged there |
|---|---|
| 0–25 ft | Clay 166, Top Soil 116, Sand 94, Red Clay 83, Topsoil 59, Black Topsoil 15 |
| 25–50 ft | Sand 99, Clay 61, Red Clay 19, Sandy Clay 13, Fine Sand 10, Brown Clay 6 |
| 50–100 ft | Sand 139, Clay 109, Red Clay 45, Sand & Clay 13, Fine Sand 11, Coarse Sand 10 |
| 100–200 ft | Sand 211, Clay 129, Red Clay 34, Coarse Sand 17, Gray Clay 9, Sand & Clay 12 |
| 200–300 ft | Sand 66, Clay 33, Red Clay 9, Sand & Clay 7, Coarse Sand 4, Gray Clay 5 |
| 300–500 ft | Sand 11, Clay 9, Tan Clay 2, Sandstone 2, Soft Clay 1, White Clay 1 |
| 500–1000 ft | Clay 3, Sand Mix 1, Sand 1, Sand & Clay 1 |
Who drills here
What the wells are for
| Purpose | Wells | Share | Median depth, ft |
|---|---|---|---|
| Domestic | 269 | 71.4% | 208 |
| Stock | 26 | 6.9% | 203 |
| Rig Supply | 26 | 6.9% | 200 |
| Monitor | 20 | 5.3% | 45 |
| Industrial | 16 | 4.2% | 200 |
| Irrigation | 15 | 4.0% | 305 |
| Public Supply | 4 | 1.1% | 315 |
| Other | 1 | 0.3% | 190 |
| Decade | Reports | Median depth, ft | Water at, ft |
|---|---|---|---|
| 2000s | 109 | 200 | 40 |
| 2010s | 145 | 211 | 50 |
| 2020s | 123 | 203 | 50 |
The deepest reports on file
| Report | Year | Depth, ft | Water at, ft | Yield, gpm | Purpose |
|---|---|---|---|---|---|
| 283829 | 2012 | 660 | 42 | 2,500 | Irrigation |
| 539974 | 2020 | 600 | 45 | 2,500 | Irrigation |
| 539979 | 2020 | 552 | — | 2,500 | Irrigation |
| 606728 | 2022 | 530 | 40 | 2,500 | Irrigation |
| 606688 | 2022 | 530 | 40 | 2,500 | Irrigation |
| 529802 | 2019 | 405 | 58 | — | Domestic |
| 521869 | 2019 | 396 | 73 | 800 | Public Supply |
| 212372 | 2005 | 385 | 40 | — | Domestic |
| 449265 | 2017 | 375 | 49 | — | Domestic |
| 537376 | 2020 | 370 | 45 | 2,500 | 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 66-40?
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 Wharton County, Fort Bend County.