South Dakota Well Data › Dewey County

Dewey County, South Dakota: well depth, water level & drilling cost

Name: Dewey County, South Dakota water well statistics
Creator: South Dakota Well Data
License: https://creativecommons.org/licenses/by/4.0/

✓ 487 SD DANR records · verified 2026-10-19

90 ftmedian well depth

70 ft–189 fttypical depth range

24 ftmedian static water level

90 ftmedian depth since 2016

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How deep are wells in Dewey County, South Dakota?

The median drilled well depth in Dewey County is 90 ft, based on 486 wells with recorded depths in the state SD DANR database. Half of all wells fall between 70 ft and 189 ft; 90% are shallower than 2,320 ft. Wells drilled since 2016 have a median depth of 90 ft.

How much does it cost to drill a well in Dewey County?

Applying published per-foot rates to the local median depth of 90 ft: drilling and casing alone typically runs $2,250–$5,850; a complete system including pump, pressure tank, and hookup typically runs $5,400–$9,000. Actual quotes depend on site access, geology, and casing requirements.

Drilled depth distribution

0–50 ft 48 50–100 ft 231 100–150 ft 61 150–200 ft 30 200–300 ft 42 300–400 ft 7 400–600 ft 0 600+ ft 67

Who drills wells in Dewey County?

Companies by number of wells completed in this county, per the completion reports South Dakota drillers file with DANR.

Driller	Wells since 2016
GREGG'S DRILLING & EXCAVATING	35
KELLER DRILLING	11
STRETCH'S WELL SERVICE, INC.	7
MATHESON DRILLING, INC.	7
AMERICAN ENGINEERING TESTING, INC.	5
PESICKA'S DRILLING	2
AMERICAN ENGINEERING TESTING,INC.	1
GINGERICH WELL & PUMP SERVICE, LLC	1

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Well records by ZIP code in Dewey County

Median depth, water level, and yield for each ZIP code with recorded wells.

Timber Lake (57656) — 197 wells, median 80 ft
Isabel (57633) — 193 wells, median 190 ft
Eagle Butte (57625) — 92 wells, median 80 ft

Method: medians computed from SD DANR records (SD DANR NR68 well completion reports, water wells only (monitoring, test-hole, geothermal-loop and dewatering records excluded); depths 0-5,000 ft). Cost estimate applies published per-foot ranges (checked 2026-06-11) to the local median depth — full methodology & sources.