Texas well grid 66-36

A 7.5-minute quadrangle of the Texas state well grid, mostly in Colorado County and Wharton County. 140 reports, median depth 165 ft.

140Reports

165 ftMedian depth

43 ftWater at

70 gpmMedian yield

What you will drill through in grid 66-36

Logged in state well grid 66-36, by depth. The figure is how many wells hit it.
Depth, ft	What was logged there
0–25 ft	Sand 30, Clay 26, Surface Soil 19, Topsoil 17, Top Soil 16, Sandy Topsoil 16
25–50 ft	Sand 26, Clay 22, White Clay 7, Gravel 7, Red Clay 4, Sand & Rock 5
50–100 ft	Sand 31, Clay 20, Rock 18, Sand & Rock 11, White Clay 7, Sand & Rock Streaks 7
100–200 ft	Sand 52, Clay 38, Rock 26, White Clay 13, Wh Clay 7, Sand & Rock 6
200–300 ft	Sand 16, Clay 13, Coarse Sand 10, Rock 3, Red Clay 1, Blue Clay 2
300–500 ft	Sand 9, Clay 6, Shale 4, Gravel 2, Clay W/ Sand Streaks 1, Tan & Red Clay 1
500–1000 ft	Clay 3, Sand 2, Hard Shale 1, Sand & Rocks 1, Good Sand 1, Rocks & Sand 1

Who drills here

Licensed firms in state well grid 66-36, busiest first.
Firm of record	Wells	Median depth, ft	Median yield, gpm	Years
Neuendorff's Water Well Svc., Inc.	29	150	60	2004–2014
Neuendorff's Water Well Service, Inc.	23	150	47	2015–2026
Joe Ferguson Drilling, Inc.	17	240	—	2004–2006
Envirotech Drilling Services LLC	7	54	—	2013
CHANDLER DRILLING INC	5	160	80	2009–2026
Crowell Drilling Company, Inc.	5	510	2,500	2003–2014
J&S WATER WELLS	5	825	100	2007–2014
Cobra Water Well Drilling, LLC.	4	210	100	2014–2023
Burleson Services, Inc.	4	300	110	2004–2009
Texas Southern Drilling	3	185	45	2022–2025
Cady's Water wells	3	135	150	2013–2019
Skutca Water Well	3	159	70	2003–2010
Stetson Water Well	3	150	35	2006
Everett Carroll Water Well Service	3	155	30	2004–2006
Chaffin Water Well Service	2	215	120	2022–2023
BEST DRILLING SERVICES, INC.	2	55	—	2022
Ballard Water Well Co. LLC	2	540	100	2018–2020
Chaffin Water Wells	2	400	42	2018
Maresh Drilling Co., Inc.	2	160	90	2003–2016
Joe Ferguson Water Well Drilling, Inc.	2	230	—	2004
J4 Water Works, LLC	1	230	—	2026
Busselman Water Wells, LLC	1	145	40	2024
Bluebonnet Water Wells	1	185	80	2024
INDEPENDENT WATER WELL SERVICE	1	123	60	2018
Geophysical Drilling, Inc.	1	144	100	2017

What the wells are for

Purpose, and how deep each went.
Purpose	Wells	Share	Median depth, ft
Domestic	62	44.3%	150
Industrial	24	17.1%	240
Stock	17	12.1%	154
Irrigation	17	12.1%	365
Rig Supply	9	6.4%	225
Monitor	8	5.7%	55
Other	1	0.7%	150
Test Well	1	0.7%	400

By decade drilled.
Decade	Reports	Median depth, ft	Water at, ft
2000s	56	200	43
2010s	57	160	45
2020s	27	155	40

The deepest reports on file

Deepest reports in state well grid 66-36. Column one is the tracking number.
Report	Year	Depth, ft	Water at, ft	Yield, gpm	Purpose
358158	2014	840	35	—	Irrigation
369317	2014	825	72	2,300	Irrigation
207430	2010	550	32	2,500	Irrigation
487362	2018	540	—	—	Industrial
351182	2014	510	42	—	Irrigation
27997	2003	461	25	—	Irrigation
619411	2022	400	75	400	Irrigation
493335	2018	400	59	42	Test Well
530755	2019	365	45	600	Irrigation
527196	2019	360	55	—	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 66-36?

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, Wharton County, Lavaca County.