⟁ South Dakota Well Data field records · 2026 survey

South Dakota Well Data › Pennington County › Keystone (57751)

Keystone, SD (57751): well depth, water level & drilling cost

✓ 426 SD DANR records · Pennington County

240 ftmedian well depth
140 ft–440 fttypical depth range
65 ftmedian static water level
—median yield (— tests)

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How deep are wells in and around Keystone (57751), South Dakota?

The median drilled well depth in and around Keystone (57751) is 240 ft, based on 425 wells with recorded depths in the state SD DANR database. Half fall between 140 ft and 440 ft; 90% are shallower than 600 ft.

How much does it cost to drill a well in and around Keystone (57751)?

Applying published per-foot rates to the local median depth of 240 ft: drilling and casing alone typically runs $6,000–$15,600; a complete system including pump, pressure tank, and hookup typically runs $14,400–$24,000. Actual quotes depend on site access, geology, and casing requirements.

What is the static water level in and around Keystone (57751)?

The median static water level is 65 ft below ground surface (middle half of wells: 35 ft–240 ft), from 83 measurements.

Drilled depth distribution

0–50 ft 16 50–100 ft 38 100–150 ft 67 150–200 ft 41 200–300 ft 81 300–400 ft 59 400–600 ft 75 600+ ft 48
Looking at a specific property in Keystone (57751)?

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Part of Pennington County well records.

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), grouped by ZIP from the recorded address. Cost estimate applies published per-foot ranges to the local median depth — full methodology & sources.