Texas well grid 66-15
A 7.5-minute quadrangle of the Texas state well grid, mostly in Austin County and Fort Bend County. 364 reports, median depth 195 ft.
364Reports
195 ftMedian depth
66 ftWater at
50 gpmMedian yield
What you will drill through in grid 66-15
| Depth, ft | What was logged there |
|---|---|
| 0–25 ft | Clay 100, Sand 54, Top Soil 48, Red Clay 38, Topsoil 33, Yellow Clay 18 |
| 25–50 ft | Sand 54, Clay 22, Red Clay 14, Red Sand 14, Clay, Sand 9, White Clay 8 |
| 50–100 ft | Sand 72, Clay 57, White Clay 26, Red Clay 16, Fine White Sand 12, Clay & Rock 10 |
| 100–200 ft | Sand 146, Clay 69, Rock 40, White Clay 26, Red Clay 14, Brown + White Clay 11 |
| 200–300 ft | Sand 27, Clay 20, Rock 9, Sand Clay 3, White Clay 4, Hard Rock 2 |
| 300–500 ft | Clay 4, Grey Clay 2, Medium Sand 1, Sand 2, Sand & Rock 1, Clay & Rock 1 |
| 500–1000 ft | Sand/Clay 1, Clay 2, Sand 2, Shell & Clay 1, Sand/Clay/Gravel 1, Clay/Limestone 1 |
| 1000–5000 ft | Sand 1, Clay 1, Sand/Clay 1, Sand/Clay/Shale 1, Sand/Clay/Limestone/Gravel 1 |
Who drills here
What the wells are for
| Purpose | Wells | Share | Median depth, ft |
|---|---|---|---|
| Domestic | 267 | 73.4% | 200 |
| Monitor | 37 | 10.2% | 50 |
| Irrigation | 18 | 4.9% | 370 |
| Stock | 14 | 3.8% | 200 |
| Environmental Soil Boring | 9 | 2.5% | 12 |
| Public Supply | 7 | 1.9% | 220 |
| Test Well | 4 | 1.1% | 60 |
| Industrial | 4 | 1.1% | 210 |
| Decade | Reports | Median depth, ft | Water at, ft |
|---|---|---|---|
| 2000s | 114 | 180 | 60 |
| 2010s | 109 | 191 | 65 |
| 2020s | 141 | 200 | 78 |
The deepest reports on file
| Report | Year | Depth, ft | Water at, ft | Yield, gpm | Purpose |
|---|---|---|---|---|---|
| 626474 | 2022 | 1,400 | 114 | 1,022 | Public Supply |
| 679464 | 2024 | 1,385 | 111 | 1,022 | Public Supply |
| 552969 | 2020 | 620 | 132 | 1,200 | Irrigation |
| 668767 | 2024 | 520 | 51 | 800 | Irrigation |
| 553671 | 2020 | 500 | 130 | 200 | Industrial |
| 523170 | 2019 | 500 | 118 | 1,200 | Irrigation |
| 267883 | 2011 | 490 | 125 | 150 | Irrigation |
| 467310 | 2017 | 480 | 100 | 100 | Irrigation |
| 518804 | 2019 | 460 | 115 | 1,000 | Irrigation |
| 554390 | 2020 | 370 | 120 | 1,200 | 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 66-15?
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 Austin County, Fort Bend County.