⟁ Montana Well Data field records · 2026 survey

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Tetra Tech

Recorded as the driller on 137 water wells across 16Montanacounties in Montana Bureau of Mines and Geology Ground Water Information Center (GWIC), most in Yellowstone County. Well-log records span 1965–2015.

137wells on record
—since 2022
16counties served
20 ftmedian depth

Counties served

Wells drilled by Tetra Tech, by county, across the full record.

CountyWells drilled
Yellowstone County52
Lewis and Clark County24
Custer County9
Valley County7
Stillwater County6
Gallatin County6
Roosevelt County6
Silver Bow County5
Flathead County5
Park County4
Dawson County4
Phillips County3
Show all 16counties
Hill County2
Deer Lodge County1
Musselshell County1
Sanders County1

Well characteristics

Across the wells Tetra Tech has drilled, the median depth is 20 ft (middle half 18 ft–29 ft), median tested yield 21 gpm, and median static water level 11 ft below ground surface. These summarize the company's own filed logs, not a marketing claim.

Original drilling logs

Recent well logs filed by Tetra Tech, straight from the public MBMG record:

"Records span 1965–2015" 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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