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Montana water data · Zip Code in Sheridan County

ZIP 59258: well depth, groundwater and water rights

What the public record says about water in ZIP code 59258: 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 577 public records from MBMG GWIC, Montana DNRC, Montana DEQ, EPA UST Finder, US Census (ZIP Code Tabulation Area)

Wells on record

253

1 per sq mi

Median well depth

65 ft

half of wells 28–126 ft

Median static water level

37 ft

139 measurements

Median tested yield

8 gpm

147 pump tests

Well depth

How deep are wells in ZIP 59258?

Of 235 wells with a recorded total depth, the median is 65 feet. Half were drilled between 28 and 126 feet; one in ten went deeper than 216 feet and one in ten found water shallower than 18 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
40%
50–100 ft
22%
100–200 ft
26%
200–300 ft
10%
300–500 ft
3%
500 ft and deeper
0%

Static water level

37 ft

median depth to water at rest · half between 15 and 83 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

8 gpm

median tested yield · half between 5 and 12 gpm

17% of tested wells produced under 5 gallons per minute and 15% 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 59258

21 wells have been completed here since 2016. The newest log on file was completed July 23, 2024. Records run back to 1902.

What the wells are for

  • Domestic93
  • Stockwater89
  • Monitoring71
  • Irrigation16
  • Test Well12

How they were drilled

  • Rotary68
  • Forward Rotary25
  • Cable Tool7
  • Hollowstem Auger5

Drillers filing well logs in ZIP 59258

  • Sk Geotechnical Co10 since 2016 · 2018
  • West Central Environmental Consultants5 since 2016 · 2024
  • Mark Adair Drilling3 since 2016 · 2018
  • Montana Salinity Control Association25 all-time · 2007
  • Agri Industries Inc20 all-time · 2007
  • Scott Brown13 all-time · 2005
  • Msca11 all-time · 2004
  • Carlson10 all-time · 1989

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 59258

Montana DNRC lists 317 water rights with a point of diversion inside this area: 158 groundwater and 159 surface water, 281 of them active. The median priority date is 1958, and the oldest claim dates to 1902.

Types of right

  • Statement Of Claim221
  • Ground Water Certificate78
  • Provisional Permit8
  • Stockwater Permit6
  • Exempt Notice2

Purposes

  • Stock191
  • Domestic42
  • Irrigation40
  • Multiple Domestic12
  • Domestic; Stock7

DNRC basins

  • 40R317

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 59258 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.

  • Fort Union Formation52 wells · 63% · median 120 ft
  • Alluvium (quaternary)16 wells · 19% · median 23 ft
  • Glacial Till8 wells · 10% · median 63 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 59258

Petroleum releases

2

1 open · 1 resolved

Superfund program sites

0

none on the National Priorities List

Registered tank facilities

5

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 2014. A property report screens the sites within a quarter, half and one mile of a specific parcel and links the agency records.