Texas well grid 57-21
A 7.5-minute quadrangle of the Texas state well grid, mostly in Llano County and Burnet County. 1,154 reports, median depth 110 ft.
1,154Reports
110 ftMedian depth
29 ftWater at
20 gpmMedian yield
What you will drill through in grid 57-21
| Depth, ft | What was logged there |
|---|---|
| 0–25 ft | Topsoil 466, Granite Gravel 420, Top Soil 208, Sandy Loam 102, Red Granite 82, Red Granite Gravel 73 |
| 25–50 ft | Granite Gravel 73, Red Granite 70, Pink Granite 54, Gravel 41, Black And Red Granite 26, Granite 13 |
| 50–100 ft | Red Granite 69, Pink Granite 53, Black And Red Granite 28, Granite Gravel 16, Granite Bedrock 17, Granite 17 |
| 100–200 ft | Red Granite 20, Pink Granite 15, Grey Granite 9, Fracture 4, Gray Granite 4, Pink Granit 3 |
| 200–300 ft | Red Granite 4, Grey Granite 3, Brown Sandstone 2, Brown And Grey Sandstone 2, Grey Limestone 2, Black/Gray 1 |
| 300–500 ft | Red Sandstone 4, White & Gray Limestone 2, Blue Shale 1, Limestone W/ River Gravel Stringers 1, Red Granite 1, Grey Limestone 1 |
| 500–1000 ft | Tan/Gray/Red S/S Hickery 1, Brown Sandstone 1, Brown And Grey Limestone And Sandstone 1, Yellow Sandstone 1, Blue Grey Limestone 1, Yellow Limestone 1 |
Who drills here
What the wells are for
| Purpose | Wells | Share | Median depth, ft |
|---|---|---|---|
| Domestic | 918 | 79.5% | 120 |
| Irrigation | 70 | 6.1% | 95 |
| Monitor | 55 | 4.8% | 47 |
| Stock | 33 | 2.9% | 160 |
| Environmental Soil Boring | 25 | 2.2% | 15 |
| Injection | 22 | 1.9% | 37 |
| Unknown | 15 | 1.3% | 220 |
| Test Well | 13 | 1.1% | 160 |
| Decade | Reports | Median depth, ft | Water at, ft |
|---|---|---|---|
| 2000s | 412 | 105 | 28 |
| 2010s | 430 | 100 | 28 |
| 2020s | 312 | 120 | 30 |
The deepest reports on file
| Report | Year | Depth, ft | Water at, ft | Yield, gpm | Purpose |
|---|---|---|---|---|---|
| 608477 | 2022 | 710 | 316 | — | Domestic |
| 686373 | 2024 | 680 | 125 | — | Stock |
| 653510 | 2023 | 680 | — | — | Stock |
| 114463 | 2007 | 680 | 249 | 20 | Domestic |
| 653974 | 2023 | 660 | 400 | — | Domestic |
| 172122 | 2004 | 640 | 194 | 25 | Domestic |
| 500436 | 2019 | 620 | 270 | — | Domestic |
| 240192 | 2011 | 600 | 109 | 7 | Domestic |
| 517461 | 2018 | 565 | 242 | 20 | Domestic |
| 516067 | 2018 | 565 | 190 | 30 | Domestic |
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 57-21?
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 Llano County, Burnet County, Williamson County.