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Montana water data · Community in Carbon County

Rockvale: well depth, groundwater and water rights

What the public record says about water in Rockvale: 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 208 public records from MBMG GWIC, Montana DNRC, Montana DEQ, EPA UST Finder, US Census (place boundary)

Wells on record

85

51.2 per sq mi

Median well depth

38 ft

half of wells 27–42 ft

Median static water level

18 ft

73 measurements

Median tested yield

25 gpm

69 pump tests

Well depth

How deep are wells in Rockvale?

Of 74 wells with a recorded total depth, the median is 38 feet. Half were drilled between 27 and 42 feet; one in ten went deeper than 59 feet and one in ten found water shallower than 25 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
81%
50–100 ft
15%
100–200 ft
3%
200–300 ft
0%
300–500 ft
0%
500 ft and deeper
1%

Static water level

18 ft

median depth to water at rest · half between 9 and 28 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 20 and 25 gpm

0% of tested wells produced under 5 gallons per minute and 75% 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 Rockvale

12 wells have been completed here since 2016, 1 of them in the last twelve months. The newest log on file was completed November 17, 2025. Records run back to 1940.

What the wells are for

  • Domestic62
  • Monitoring9
  • Irrigation7
  • Stockwater6
  • Public Water Supply2

How they were drilled

  • Rotary52
  • Forward Rotary8
  • Drilled6
  • Cable3

Drillers filing well logs in Rockvale

  • Aaqua Drilling Inc9 since 2016 · 2025
  • American Drilling & Supply2 since 2016 · 2021
  • Rock Creek Drilling Inc8 all-time · 1999
  • Haz Tech Drilling Inc5 all-time · 2015
  • B & H3 all-time · 1976

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 Rockvale

Montana DNRC lists 120 water rights with a point of diversion inside this area: 62 groundwater and 58 surface water, 112 of them active. The median priority date is 1973, and the oldest claim dates to 1889.

Types of right

  • Statement Of Claim63
  • Ground Water Certificate53
  • Provisional Permit2
  • Water Reservation1
  • Irrigation District1

Purposes

  • Irrigation54
  • Domestic21
  • Domestic; Lawn And Garden14
  • Stock7
  • Lawn And Garden4

DNRC basins

  • 43D120

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 Rockvale 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)53 wells · 80% · 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 Rockvale

Petroleum releases

2

1 open · 1 resolved

Superfund program sites

0

none on the National Priorities List

Registered tank facilities

1

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 1996. A property report screens the sites within a quarter, half and one mile of a specific parcel and links the agency records.