Texas well grid 66-04
A 7.5-minute quadrangle of the Texas state well grid, mostly in Colorado County and Austin County. 307 reports, median depth 205 ft.
307Reports
205 ftMedian depth
105 ftWater at
25 gpmMedian yield
What you will drill through in grid 66-04
| Depth, ft | What was logged there |
|---|---|
| 0–25 ft | Clay 63, Shale 51, Sand 43, Top Soil 34, Black Land 34, Tan Clay 22 |
| 25–50 ft | Sand 20, Clay 14, Tan Clay 15, Rock 7, Clay & Rock 4, Brown + Gray Clay 5 |
| 50–100 ft | Sand 53, Rock 22, Tan Clay 15, Sand & Rock 12, Shale 12, Gray Clay 9 |
| 100–200 ft | Sand 74, Shale 42, Rock 22, Clay 23, Tan Clay 14, Gray Clay 11 |
| 200–300 ft | Sand 39, Shale 23, Rock 9, Clay 9, Gray Clay 5, Tan Clay 5 |
| 300–500 ft | Sand 18, Shale 16, Rock 10, Clay 6, Sand & Rock 3, Hard Brown & Red Shale 1 |
| 500–1000 ft | Rock 2, Sand 2, Sandy Hard Shale 1, Clay 1, Gray Sand 1, Rock & Sand 1 |
Who drills here
What the wells are for
| Purpose | Wells | Share | Median depth, ft |
|---|---|---|---|
| Domestic | 265 | 86.3% | 204 |
| Stock | 26 | 8.5% | 225 |
| Irrigation | 5 | 1.6% | 370 |
| Rig Supply | 3 | 1.0% | 510 |
| Monitor | 3 | 1.0% | — |
| Other | 2 | 0.7% | 280 |
| Fracking Supply | 1 | 0.3% | 720 |
| Closed-Loop Geothermal | 1 | 0.3% | 300 |
| Decade | Reports | Median depth, ft | Water at, ft |
|---|---|---|---|
| 1960s | 1 | 119 | 70 |
| 2000s | 87 | 190 | 104 |
| 2010s | 121 | 210 | 96 |
| 2020s | 98 | 212 | 110 |
The deepest reports on file
| Report | Year | Depth, ft | Water at, ft | Yield, gpm | Purpose |
|---|---|---|---|---|---|
| 224059 | 2010 | 801 | 87 | 22 | Domestic |
| 453156 | 2017 | 720 | — | 100 | Fracking Supply |
| 718939 | 2026 | 710 | 115 | 95 | Irrigation |
| 568963 | 2021 | 615 | 100 | 50 | Domestic |
| 371254 | 2014 | 540 | 60 | 35 | Domestic |
| 631422 | 2022 | 510 | 120 | 100 | Rig Supply |
| 388097 | 2015 | 510 | 130 | 120 | Domestic |
| 637434 | 2023 | 500 | 80 | 20 | Domestic |
| 474284 | 2018 | 440 | 40 | 80 | Domestic |
| 474282 | 2018 | 440 | 40 | 80 | Stock |
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 66-04?
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 Colorado County, Austin County, Fayette County.