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Montana water data · Community in Carbon County

Roberts: well depth, groundwater and water rights

What the public record says about water in Roberts: 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 273 public records from MBMG GWIC, Montana DNRC, Montana DEQ, EPA UST Finder, US Census (place boundary)

Wells on record

133

33.4 per sq mi

Median well depth

34 ft

half of wells 29–53 ft

Median static water level

8 ft

115 measurements

Median tested yield

25 gpm

115 pump tests

Well depth

How deep are wells in Roberts?

Of 123 wells with a recorded total depth, the median is 34 feet. Half were drilled between 29 and 53 feet; one in ten went deeper than 110 feet and one in ten found water shallower than 24 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
73%
50–100 ft
14%
100–200 ft
11%
200–300 ft
1%
300–500 ft
2%
500 ft and deeper
0%

Static water level

8 ft

median depth to water at rest · half between 6 and 16 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

25 gpm

median tested yield · half between 15 and 40 gpm

7% of tested wells produced under 5 gallons per minute and 70% 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 Roberts

20 wells have been completed here since 2016, 5 of them in the last twelve months. The newest log on file was completed September 14, 2026. Records run back to 1900.

What the wells are for

  • Domestic96
  • Irrigation16
  • Stockwater10
  • Monitoring9
  • Public Water Supply7

How they were drilled

  • Rotary64
  • Churn10
  • Forward Rotary8
  • Drilled7

Drillers filing well logs in Roberts

  • Aaqua Drilling Inc14 since 2016 · 2026
  • Douglas Drilling Llc3 since 2016 · 2026
  • Douglas Drilling19 all-time · 2013
  • B & H Drilling12 all-time · 1997
  • Rock Creek Drilling Inc12 all-time · 2002
  • Mayes Drilling Inc5 all-time · 2003

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 Roberts

Montana DNRC lists 136 water rights with a point of diversion inside this area: 80 groundwater and 56 surface water, 125 of them active. The median priority date is 1978, and the oldest claim dates to 1888.

Types of right

  • Ground Water Certificate61
  • Statement Of Claim46
  • Provisional Permit19
  • Exempt Notice6
  • Conservation District Record2

Purposes

  • Irrigation44
  • Domestic30
  • Lawn And Garden14
  • Stock11
  • Domestic; Lawn And Garden10

DNRC basins

  • 43D136

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 Roberts 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)54 wells · 53% · median 30 ft
  • Fort Union Formation26 wells · 25% · median 80 ft
  • Terrace Deposits (quaternary)14 wells · 14% · median 29 ft
  • Sand And Gravel (pleistocene)7 wells · 7% · median 36 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 Roberts

Petroleum releases

1

0 open · 1 resolved

Superfund program sites

0

none on the National Priorities List

Registered tank facilities

3

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 1997. A property report screens the sites within a quarter, half and one mile of a specific parcel and links the agency records.