ZIP 59845: well depth, groundwater and water rights

Well depth

How deep are wells in ZIP 59845?

Of 595 wells with a recorded total depth, the median is 244 feet. Half were drilled between 143 and 305 feet; one in ten went deeper than 372 feet and one in ten found water shallower than 50 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 59845

52 wells have been completed here since 2016, 11 of them in the last twelve months. The newest log on file was completed August 21, 2026. Records run back to 1900.

Water rights

Water rights on file in ZIP 59845

Montana DNRC lists 1,147 water rights with a point of diversion inside this area: 726 groundwater and 419 surface water, 995 of them active. The median priority date is 1940, and the oldest claim dates to 1855.

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 59845 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.

• Lonepine Aquifer (little Bitterroot Valley)228 wells · 46% · median 278 ft
• Prichard Formation Or Slate82 wells · 17% · median 179 ft
• Glacial Lake Missoula Beds52 wells · 11% · median 102 ft
• Alluvium (pleistocene)50 wells · 10% · median 182 ft
• Ravalli Group19 wells · 4% · median 280 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 59845

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.