Texas well grid 66-35
A 7.5-minute quadrangle of the Texas state well grid, mostly in Lavaca County and Colorado County. 213 reports, median depth 185 ft.
213Reports
185 ftMedian depth
69 ftWater at
60 gpmMedian yield
What you will drill through in grid 66-35
| Depth, ft | What was logged there |
|---|---|
| 0–25 ft | Sand 69, Clay 74, Top Soil 23, Red Clay 17, Surface Sand 12, Sandy Topsoil 11 |
| 25–50 ft | Sand 44, Clay 31, White Clay 5, Red Clay 4, Tan Sand 4, Brown Sand 4 |
| 50–100 ft | Clay 52, Sand 51, White Clay 14, Red Clay 12, Sandstone 9, Brown Sand 7 |
| 100–200 ft | Clay 81, Sand 59, Rock 14, White Clay 13, Red Clay 12, Tan Clay 10 |
| 200–300 ft | Sand 19, Clay 20, Red Clay 9, Rock 7, Tan Clay 5, Shale 4 |
| 300–500 ft | Shale 3, Clay 3, Sand 2, Sand Mix 1, Shale & Clay 1, Sandstone 1 |
| 500–1000 ft | Sand 1, Clay 1 |
Who drills here
What the wells are for
| Purpose | Wells | Share | Median depth, ft |
|---|---|---|---|
| Domestic | 159 | 74.6% | 184 |
| Stock | 23 | 10.8% | 220 |
| Irrigation | 8 | 3.8% | 245 |
| Public Supply | 6 | 2.8% | 300 |
| Rig Supply | 6 | 2.8% | 265 |
| Industrial | 6 | 2.8% | 260 |
| Monitor | 5 | 2.3% | 50 |
| Decade | Reports | Median depth, ft | Water at, ft |
|---|---|---|---|
| 2000s | 83 | 186 | 65 |
| 2010s | 71 | 175 | 66 |
| 2020s | 59 | 194 | 77 |
The deepest reports on file
| Report | Year | Depth, ft | Water at, ft | Yield, gpm | Purpose |
|---|---|---|---|---|---|
| 549086 | 2020 | 772 | 167 | 300 | Public Supply |
| 170221 | 2009 | 380 | 100 | 75 | Domestic |
| 160520 | 2008 | 378 | 97 | — | Stock |
| 482425 | 2018 | 375 | 144 | 50 | Domestic |
| 215604 | 2010 | 322 | 105 | 60 | Domestic |
| 667889 | 2024 | 315 | 122 | 60 | Domestic |
| 194687 | 2007 | 315 | 117 | 100 | Domestic |
| 715175 | 2025 | 304 | 125 | 100 | Stock |
| 679245 | 2024 | 300 | 92 | 200 | Public Supply |
| 211113 | 2005 | 300 | — | — | Industrial |
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 66-35?
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 Lavaca County, Colorado County, DeWitt County, Wharton County.