ZIP 59215: well depth, groundwater and water rights

Well depth

How deep are wells in ZIP 59215?

Of 1,016 wells with a recorded total depth, the median is 115 feet. Half were drilled between 60 and 181 feet; one in ten went deeper than 278 feet and one in ten found water shallower than 35 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.

Drilling activity

Recent well drilling in ZIP 59215

149 wells have been completed here since 2016, 7 of them in the last twelve months. The newest log on file was completed August 12, 2026. Records run back to 1908.

Water rights

Water rights on file in ZIP 59215

Montana DNRC lists 2,241 water rights with a point of diversion inside this area: 1,106 groundwater and 1,135 surface water, 2,129 of them active. The median priority date is 1960, and the oldest claim dates to 1864.

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 59215 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.)157 wells · 50% · median 94 ft
• Fox Hills-hell Creek Aquifer55 wells · 17% · median 306 ft
• Fort Union Formation39 wells · 12% · median 120 ft
• Tullock Member (of Ft Union Fm.)22 wells · 7% · median 154 ft
• Lebo Shale Member (of Ft Union Fm.)18 wells · 6% · median 150 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 59215

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 2020. A property report screens the sites within a quarter, half and one mile of a specific parcel and links the agency records.