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Montana water data · Zip Code in Big Horn County

ZIP 59066: well depth, groundwater and water rights

What the public record says about water in ZIP code 59066: how deep wells go, where the water table sits, what wells produce, which water rights are on file, and which documented environmental sites are nearby. Area statistics orient you; a property report analyzes the records around one specific parcel.

Updated September 2026 · Based on 333 public records from MBMG GWIC, Montana DNRC, Montana DEQ, EPA UST Finder, US Census (ZIP Code Tabulation Area)

Wells on record

86

0.3 per sq mi

Median well depth

55 ft

half of wells 40–160 ft

Median static water level

20 ft

73 measurements

Median tested yield

20 gpm

71 pump tests

Well depth

How deep are wells in ZIP 59066?

Of 81 wells with a recorded total depth, the median is 55 feet. Half were drilled between 40 and 160 feet; one in ten went deeper than 370 feet and one in ten found water shallower than 30 feet. Depth is set by local geology and position on the landscape, both of which change over short distances, so the spread matters as much as the median.

under 50 ft
41%
50–100 ft
23%
100–200 ft
15%
200–300 ft
2%
300–500 ft
15%
500 ft and deeper
4%

Static water level

20 ft

median depth to water at rest · half between 14 and 40 ft

The static level is how far below ground the water stands before pumping, measured by the driller at completion. It affects pump setting and operating cost, and it moves with season and with neighbouring use.

Well yield

20 gpm

median tested yield · half between 10 and 30 gpm

8% of tested wells produced under 5 gallons per minute and 58% produced 20 or more. These are short completion tests, not sustained-capacity tests; a household typically needs 3 to 5 gpm with storage.

Drilling activity

Recent well drilling in ZIP 59066

8 wells have been completed here since 2016. The newest log on file was completed April 15, 2025. Records run back to 1927.

What the wells are for

  • Domestic48
  • Stockwater24
  • Irrigation4
  • Monitoring4
  • Public Water Supply3

How they were drilled

  • Rotary40
  • Cable11
  • Forward Rotary6
  • Unknown4

Drillers filing well logs in ZIP 59066

  • American Drilling & Supply3 since 2016 · 2020
  • Douglas Drilling1 since 2016 · 2022
  • Aaqua Drilling Inc1 since 2016 · 2024
  • Little Horn5 all-time · 1980
  • Rock Creek Drilling Inc4 all-time · 2000
  • Billings4 all-time · 1982
  • United States Geological Survey3 all-time · 1990
  • Gary Mayes Drilling Inc3 all-time · 2007

Ranked by well logs filed with GWIC, public record only. Not an endorsement, a referral or a paid listing; we have no business relationship with these companies. Verify licensing with the Montana Board of Water Well Contractors before hiring.

Water rights

Water rights on file in ZIP 59066

Montana DNRC lists 231 water rights with a point of diversion inside this area: 64 groundwater and 167 surface water, 192 of them active. The median priority date is 1910, and the oldest claim dates to 1868.

Types of right

  • Statement Of Claim104
  • Reserved Claim97
  • Ground Water Certificate30

Purposes

  • Stock162
  • Irrigation26
  • Domestic17
  • Multiple Domestic8
  • Institutional4

DNRC basins

  • 43E190
  • 43P31
  • 43N9
  • 43D1

Area totals describe the neighbourhood, not any one parcel. Montana publishes no authoritative link between a parcel and a water right; whether a right attaches to a specific property is a property-level question that our reports answer with the DNRC abstract linked.

Aquifers and geology

What wells in ZIP 59066 draw from

Drillers record the aquifer a well is completed in. The units below account for the wells here that carry an aquifer assignment; the median depth beside each is for wells completed in that unit.

  • Alluvium (quaternary)16 wells · 62% · median 40 ft

Aquifer assignments are the driller's, recorded at completion, and many older logs carry none. Absence of an assignment is not evidence about the geology.

Environmental groundwater screening

Documented environmental sites in ZIP 59066

Petroleum releases

3

0 open · 3 resolved

Superfund program sites

0

none on the National Priorities List

Registered tank facilities

13

underground storage tanks, current and historical

A documented release or site in the area is not evidence that any particular well is affected. Whether a release reaches a well depends on groundwater flow direction, geology, well depth and construction, the extent of the plume and the cleanup performed. The most recent release reported here dates to 1998. A property report screens the sites within a quarter, half and one mile of a specific parcel and links the agency records.