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How deep are water wells in Buchanan Dam, Texas?

Home water wells in and around Buchanan Dam, Texas are typically 100 to 200 feet deep (median 144 ft, 187 wells drilled in the last 10 years). New wells run about 25% deeper than 20 years ago (median 120 ft in 2003 to 2007, 150 ft in 2021 to 2025). Estimated cost of a complete well at the median depth: $6,000 to $15,000.

Updated every day from Texas Water Development Board driller reports. Last update: November 11, 2026, using the state file of November 10, 2026.

See the wells and layers at an exact pointLlano County
What is under Buchanan Dam, TexasUnderground column at the center of Buchanan Dam: median well 144 ft, middle half 100 to 200 ft, water at 32 ft.No state layer model here yet0100200300400ftGround levelMedian well: 144 ftWater standing in the well from 32 ftWater level32 ftMiddle half100–200 ftMedian well144 ft

Under Buchanan Dam, Llano County

The well and the water are the median of 187 real wells. This atlas does not have a state layer model for this area yet.

Home wells in and around Buchanan Dam

Each dot is a home well from a state driller report, colored by depth. Tap one for its details and official report. Tap an empty spot to see what is under that point.

See underground

Well depth (ft)

  • <100
  • 100
  • 200
  • 300
  • 400
  • 600
  • 800+

Dashed line: Buchanan Dam and about 2 miles around it

Key figures

Typical depth (middle half)
100 to 200 feet
Median depth
144 feet
Deepest 10% are past
305 feet
Water level (median)
32 feet
92 wells
Yield (median)
23 gpm
134 wells, gallons per minute
Wells used
187
In the last 10 years
Inside the city limits
73
the rest within 2 miles
All years on file
568
median 140 ft, since 1979
Confidence
Standard (30 or more wells)

When the wells were finished, the water stood a median 32 feet below the surface (92 wells), well above the bottom: the typical well holds about 112 feet of water.

What is under Buchanan Dam, TexasUnderground column at the center of Buchanan Dam: median well 144 ft, middle half 100 to 200 ft, water at 32 ft.No state layer model here yet0100200300400ftGround levelMedian well: 144 ftWater standing in the well from 32 ftWater level32 ftMiddle half100–200 ftMedian well144 ft
The well and the water are the median of 187 real wells. This atlas does not have a state layer model for this area yet.

Which formation do wells in Buchanan Dam draw from?

We cannot say yet for Buchanan Dam. This atlas assigns layers with the TWDB layered models processed so far (the Northern Trinity and Woodbine model, the Hill Country Trinity model, the northern Gulf Coast Aquifer model and the High Plains Aquifer System model), and none covers this area with enough wells. The depth, water level and yield on this page do come from the real wells here.

See the aquifers mapped under Llano County

Depth over time

New home wells in and around Buchanan Dam are deeper than 20 years ago: the median went from 120 feet (2003 to 2007) to 150 feet (2021 to 2025), 25% more. Deeper wells do not always mean the water dropped: a driller may be going for another layer, better water or more reserve.

PeriodMedian depth (ft)Wells
2001–2005120104
2006–2010120153
2011–2015142111
2016–202014088
2021–2025150104
2026under 10 wells7

What a well costs in Buchanan Dam

At the median depth for Buchanan Dam (144 feet), a complete home well would cost roughly $6,000 to $15,000: $25 to $60 per foot for drilling, casing and seal, plus $2,500 to $6,500 for the pump, pressure tank, controls and hookup at the well. Across the whole middle half of depths (100 to 200 feet) the range runs from $5,000 to $18,500. This is TerraFunded's estimate from published Texas prices, not a quote, and it leaves out trenching and the line to the house. Get prices from at least two licensed drillers.

Where it sits

Nearby places

Median depth of home wells in each place.

All Texas cities and towns

Common questions

How deep do you have to drill a well in Buchanan Dam, Texas?

Home water wells in and around Buchanan Dam, Texas are typically 100 to 200 feet deep (median 144 ft, 187 wells drilled in the last 10 years). One in ten goes past 305 feet. The depth a given tract needs depends on where it sits and what layers the driller hits.

How much does a water well cost in Buchanan Dam?

At the median depth (144 feet), a complete well would cost roughly $6,000 to $15,000, by TerraFunded's estimate from published Texas driller prices. The real price comes from a licensed driller's quote.

How deep is the water in Buchanan Dam?

When the wells were finished, the water stood a median 32 feet below the surface (92 wells), well above the bottom: the typical well holds about 112 feet of water. The level moves with drought and from one well to the next.

Do I need a permit to drill a well in Buchanan Dam?

Buchanan Dam is inside the Central Texas Groundwater Conservation District. Groundwater conservation districts in Texas can require registering or permitting a new well, keeping set distances from property lines and other wells, and paying fees. Rules differ from district to district: ask the district before drilling.

How these numbers are made

We count new and replacement domestic (home) wells whose coordinates fall inside the place boundary or within 2 miles of it. We use the last 10 years when there are at least 30 wells; otherwise all since 2001. The median is the middle well and the middle half runs from the 25th to the 75th percentile.

These are depths of real wells drilled nearby, not a promise about any property. Groundwater can change over short distances and with drought. A licensed water well driller can tell you what to expect on a specific tract.

Read the full methodology · Download the data (CSV, CC BY 4.0)

How to cite

TerraFunded (2026). Texas Well Atlas: Underground. From Texas Water Development Board driller reports and groundwater availability models (data as of November 10, 2026). https://terrafunded.com/wells/places/buchanan-dam-tx. License CC BY 4.0. https://doi.org/10.5281/zenodo.24126380.

Sources