Texas well grid 66-16

A 7.5-minute quadrangle of the Texas state well grid, mostly in Austin County and Waller County. 516 reports, median depth 205 ft.

516Reports

205 ftMedian depth

55 ftWater at

60 gpmMedian yield

What you will drill through in grid 66-16

Logged in state well grid 66-16, by depth. The figure is how many wells hit it.
Depth, ft	What was logged there
0–25 ft	Clay 146, Sand 113, Red Clay 71, Top Soil 53, Topsoil 36, Clay, Sand 20
25–50 ft	Sand 63, Clay 42, Gravel 33, Rock 24, Red Clay 12, Sand/Gravel 9
50–100 ft	Clay 91, Sand 73, Rock 37, Gravel 22, White Clay 15, Red Clay 16
100–200 ft	Sand 203, Clay 140, Rock 66, Red Clay 27, White Clay 23, Clay, Sand 15
200–300 ft	Sand 94, Clay 60, Rock 26, Red Clay 11, Tan Clay 10, Clay, Sand 8
300–500 ft	Sand 33, Clay 16, Rock 6, Clay, Rock 2, Rock, Sand 2, Shale 1
500–1000 ft	Clay 3, Sand 2, Caliche Clay Sand 1, Rock 1, Shale 1

Who drills here

Licensed firms in state well grid 66-16, busiest first.
Firm of record	Wells	Median depth, ft	Median yield, gpm	Years
Geophysical Drilling, Inc.	81	252	75	2003–2022
Ricky Bonds Water Wells	51	225	60	2004–2026
Skutca Water Well	27	165	50	2003–2013
A.W. Flentge Service	24	163	25	2002–2020
BEST DRILLING SERVICES, INC.	21	37	—	2007–2016
Bluebonnet Water Wells	19	210	55	2024–2026
NORTHWEST WATER WELLS	19	230	70	2002–2010
Main Stream Environmental	18	200	45	2017–2025
O'Day Drilling Company, Inc.	15	389	80	2002–2020
HEFLIN WATER WORKS	14	190	50	2004–2016
Kenco Water Well Service	13	241	60	1999–2010
Burleson Services, Inc.	13	180	90	2003–2007
Neuendorff's Water Well Service, Inc.	12	200	60	2016–2025
AQUA STAR LLC	12	240	50	2015–2024
Leon Flentge Water Well Drilling and Service	12	204	55	2004–2013
Texas Southern Drilling	11	185	40	2021–2025
1st Choice Water Wells	11	182	50	2013–2019
Mesecke Water Well	9	210	18	2004–2015
Kenco Water Well Svc	8	207	65	2010–2022
Leon Flentge Water Well Drilling	8	240	80	2013–2017
Terra Power Drilling LLC	8	180	35	2009–2015
Ondrey Water Well Service	7	225	—	2007–2017
Neuendorff's Water Well Svc., Inc.	7	140	70	2005–2011
Scott Drilling Inc.	6	200	50	2013–2021
TIM FRANKS WATER WELL SERVICE	5	205	75	2023–2025

What the wells are for

Purpose, and how deep each went.
Purpose	Wells	Share	Median depth, ft
Domestic	420	81.4%	205
Irrigation	28	5.4%	253
Monitor	14	2.7%	65
Rig Supply	13	2.5%	200
Stock	12	2.3%	198
Industrial	9	1.7%	240
Other	6	1.2%	222
Environmental Soil Boring	5	1.0%	8

By decade drilled.
Decade	Reports	Median depth, ft	Water at, ft
1960s	1	165	25
1990s	1	180	60
2000s	206	200	56
2010s	184	205	55
2020s	124	210	57

The deepest reports on file

Deepest reports in state well grid 66-16. Column one is the tracking number.
Report	Year	Depth, ft	Water at, ft	Yield, gpm	Purpose
531539	2020	624	110	60	Domestic
38409	2003	561	151	80	Domestic
613033	2022	530	35	140	Irrigation
486811	2018	510	60	60	Irrigation
276626	2011	485	90	360	Public Supply
168450	2004	480	78	100	Domestic
156442	2008	480	150	80	Industrial
38413	2003	474	155	80	Domestic
658549	2023	450	60	150	Domestic
417978	2016	440	100	70	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 66-16?

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, Waller County, Matagorda County, Chambers County, Fayette County.