Montana water data · Zip Code in Dawson County
ZIP 59315: well depth, groundwater and water rights
What the public record says about water in ZIP code 59315: 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 601 public records from MBMG GWIC, Montana DNRC, Montana DEQ, EPA UST Finder, US Census (ZIP Code Tabulation Area)
Wells on record
260
1.1 per sq mi
Median well depth
90 ft
half of wells 48–172 ft
Median static water level
45 ft
190 measurements
Median tested yield
10 gpm
218 pump tests
Well depth
How deep are wells in ZIP 59315?
Of 238 wells with a recorded total depth, the median is 90 feet. Half were drilled between 48 and 172 feet; one in ten went deeper than 250 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.
Static water level
45 ft
median depth to water at rest · half between 26 and 85 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
10 gpm
median tested yield · half between 5 and 15 gpm
19% of tested wells produced under 5 gallons per minute and 20% 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 59315
11 wells have been completed here since 2016. The newest log on file was completed November 22, 2023. Records run back to 1900.
What the wells are for
- Stockwater157
- Domestic125
- Irrigation18
- Monitoring18
- Unused7
How they were drilled
- Rotary48
- Cable25
- Forward Rotary15
- Bored13
Drillers filing well logs in ZIP 59315
- Sharp Drilling Inc6 since 2016 · 2023
- H & H Drilling3 since 2016 · 2022
- Hansen Environmental Drilling1 since 2016 · 2026
- Haggerty Drilling20 all-time · 1989
- Whitmer & Sons Drilling12 all-time · 1975
- Salsbury Well Drilling Inc4 all-time · 1989
- Gulbraa3 all-time · 1982
- Chrest3 all-time · 1964
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 59315
Montana DNRC lists 334 water rights with a point of diversion inside this area: 214 groundwater and 120 surface water, 313 of them active. The median priority date is 1951, and the oldest claim dates to 1906.
Types of right
- Statement Of Claim226
- Ground Water Certificate87
- Provisional Permit10
- Stockwater Permit8
- Exempt Notice3
Purposes
- Stock213
- Domestic60
- Irrigation22
- Domestic; Stock15
- Multiple Domestic5
DNRC basins
- 42M327
- 40P7
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 59315 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.
- Tongue River Member (of Ft Union Fm.)151 wells · 77% · median 90 ft
- Fort Union Formation30 wells · 15% · median 94 ft
- Alluvium (quaternary)8 wells · 4% · median 22 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 59315
Petroleum releases
4
0 open · 4 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.