Gillespie County Water Wells

The Hill Country Underground Conservation District “District” began registering new water wells drilled in late 1989 and in 1999 began issuing permits for permitted wells (i.e. commercial, irrigation, municipal) as well.
 

After the District was created District personnel contacted local drillers to get copies of the driller’s logs for Gillespie County that were drilled prior to the establishment of the District.  It is an on-going process locating these wells. The District is not in possession of all the driller’s log prior to the Districts creation as some driller were no longer in business or the drilling company was not from the surrounding area.  In addition, wells drilled prior to 1965 were not required to file driller’s log with the state.

To View Well Information (click here)

Due to the large amount of data, “GillespieCountyWellLocations” might not fully draw until you zoom in to the area of interest.  When message pops up “Layer did not draw completely” keep clicking ok until you are zoomed in to the area of interest. 

·        To view click on red dot or inside of parcel lines for property address (if available).

·        Once you find the well information you are looking for and need a copy of the well log, please contact us with the HCUWCD # and we can Email you the well log.

Please note the District will continue to update the map on a regular basis as new wells are drilled and/or existing wells (pre-District) are located.

Contact the District if you find any errors (i.e. miss located).  In addition, there are properties that have a well but the District does not show one, however if you can provide who the owner was at the time the well was drilled we can look up to see if we have the well log just not located.

Well Types:

·        Registered Wells – wells used solely for domestic and livestock (Prefixes with ER, R, KK, OW, WT)

·        Permitted Wells – wells used for commercial, irrigation or municipal purposes which are subject to the District requirements regarding spacing and production limits (Prefix with P * i.e. PI-00001)

·        Historic Wells – wells that were in existence prior to November of 1999 that were used for commercial, irrigation or municipal purposes are exempt from current permitting requirements (Prefix with G * i.e. GI-00001)

Registered wells with prefixes “KK, OW, and WT” the District does not have a driller’s log for that particular well along with some permitted and historic wells.

Disclaimer

The information found is compiled and made available as public service by the District and the Gillespie County Appraisal District “GCAD”; and

This product is for informational purposes only and may not have been prepared for or be suitable for legal, engineering, or surveying purposes. It does not represent an on-the-ground survey and represents only the approximate relative location of property boundaries; and

The District and GCAD make no warranty as to the accuracy, reliability, or completeness of the information and are not responsible for any errors or omissions or for results obtained from the use of the information. The District and GCAD expressly disclaim any and all liability in connection herewith. Use of the information is the sole responsibility of the user.

Formation Sequence Map (click here)

There is a section within a water well report called description and color formation. It is a written record of the geological formations (soil layers) drilled, according to depth.  For instance, if the first 2 feet below the surface consists of topsoil, followed by 23 feet of caliche and gravel, and 75 feet of brown and gray clay.  The description and color formation section will list: 0-2 Topsoil; 2-25 Caliche and Gravel; 25-100 Brown and Gray Clay. From this information and the area where the well is located, picks can be made for the formations encountered. This information helps identify the aquifer being used for the water supply. 

Below is the code/formation explanation for the “FormationSequence” map. The formations each well encounters will show up in the “pop up” box on the map when you click on a specific dot. The formation sequence units are in feet MSL, which refers to mean sea level.  MSL is a reference point for elevations.  For example, HCUWCD # R-00238 elevation in MSL is 1745’ and the geologic formation sequence is 0-7 Glen Rose, 7-313 Hensel, and 313-320 Ellenburger.  The “pop up” box will show the following:

glentop: 1745 (Glen Rose Top) * Elevation
glenbot: 1738 (Glen Rose bottom) * Elevation minus Glen Rose bottom (1745-7)

glenthk: 7 (Glen Rose thickness) * Glen Rose bottom minus Glen Rose top (7-0)
hentop:  1738 (Hensel top) * Elevation minus Hensel top (1745-7)

henbot:  1432 (Hensel bottom) * Elevation minus Hensel bottom (1745-313)

henthk: 306 (Hensel thickness) * Hensel bottom minus Hensel top (313-7)

elltop:   1432 (Ellenburger top) * Elevation minus Ellenburger top (1745-313)

ellbot:    1425 (Ellenburger bottom) * Elevation minus Ellenburger bottom (1745-320)

ellthk:    no Ellenburger thickness because the well did not go through the whole formation

 

If the well did not go through a particular geologic formation “0” will appear. Please note well locations may or may not be accurate and could change in the future will additional information received. In addition, any geologic interpretation is for internal use and subject to change.

Code

Formation

Code

Formation

Explanation

ed

Edwards

dou

Doublehorn Shale

top = top of formation

glen

Glen Rose

ive

Ives Breccia

bot = bottom of formation

hen

Hensel

str

Stribling

thk = thickness

cow

Cow Creek

ell

Ellenburger

If the bottom of the formation is not equal to the top of the underlying formation, there is no thickness.   Well did not go through the whole formation.

ham

Hammett

san

San Saba

sli

Sligo

pp

Point Peak

hos

Hosston

mor

Morgan Creek

s-h

Sligo-Hosston

wel

Welge

pen

Pennslyvania

lion

Lion Mountain

smi

Smithwick

cap

Cap Mountain

mar

Marble Falls

hic

Hickory

bar

Barnet

prec

Precambrian

cha

Chappel

 

Disclaimer

The information found is compiled and made available as public service by the District and the Gillespie County Appraisal District “GCAD”; and

This product is for informational purposes only and may not have been prepared for or be suitable for legal, engineering, or surveying purposes. It does not represent an on-the-ground survey and represents only the approximate relative location of property boundaries; and

The District and GCAD make no warranty as to the accuracy, reliability, or completeness of the information and are not responsible for any errors or omissions or for results obtained from the use of the information. The District and GCAD expressly disclaim any and all liability in connection herewith. Use of the information is the sole responsibility of the user.