Montana Well Data field records · 2026 survey

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Preston Drilling

Recorded as the driller on 1,000 water wells across 6 Montana counties in Montana Bureau of Mines and Geology Ground Water Information Center (GWIC), most in Ravalli County. Well-log records span 1962–2003.

1,000wells on record
since 2022
6counties served
100 ftmedian depth

Counties served

Wells drilled by Preston Drilling, by county, across the full record.

CountyWells drilled
Ravalli County 981
Granite County 10
Blaine County 3
Missoula County 3
Deer Lodge County 2
Lake County 1

Well characteristics

Across the wells Preston Drilling has drilled, the median depth is 100 ft (middle half 50 ft–180 ft), median tested yield 12 gpm, and median static water level 35 ft below ground surface. These summarize the company's own filed logs, not a marketing claim.

Original drilling logs

Recent well logs filed by Preston Drilling, straight from the public MBMG record:

"Records span 1962–2003" refers to the earliest and latest well logs attributed to this company in the MBMG database — the state digitized older paper logs, so the first date is the oldest record on file, not necessarily the company's founding year.

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