Valley County, Montana

Overview

Valley County is a large northeastern Montana county anchored by Glasgow, a Hi-Line town on the Milk River that has served as the commercial hub for the surrounding agricultural region since the Great Northern Railway arrived in the 1880s. The county’s defining geographic feature is Fort Peck Reservoir, formed by Fort Peck Dam — one of the largest earth-fill dams in the world, built by the Army Corps of Engineers during the 1930s as a New Deal public works project. The reservoir impounds the Missouri River and dominates the county’s southern half. Agriculture is a wheat-and-cattle economy, with large dryland grain operations on the northern plains and cow-calf ranching on native range and in the breaks above the reservoir. Glasgow is also home to the former Glasgow Air Force Base (now Glasgow Industrial Airport / St. Marie), which played a role in Cold War-era defense.

Weather & Moisture

Valley County has no SNOTEL stations — the county is entirely plains and river-break terrain with no mountain snowpack. The primary USGS gauge is the Milk River at Nashua (06174500), located near the confluence of the Milk River and the Missouri River. The Milk River is a critical irrigation source for downstream users, but it runs low in dry years — currently reading at just the 5th percentile, well below normal. The county has 1 Montana Mesonet station reporting soil moisture. Fort Peck Reservoir levels, managed by the Army Corps of Engineers, are a separate and significant water management factor for the broader Missouri River system but do not directly support most Valley County irrigation (which depends on the Milk River and smaller tributaries).

Water Rights & Land Ownership

Water rights in Valley County are concentrated on the Milk River and its tributaries, with some rights on smaller Missouri River tributary streams. The Milk River Project (Bureau of Reclamation) delivers stored water from Fresno Reservoir upstream (Hill County) through the Milk River channel to irrigators downstream, including portions of Valley County. The Milk River is one of the most contested water systems in Montana, with competition between irrigators, the Fort Belknap Indian Reservation (upstream), municipalities, and instream flow needs. Fort Peck Reservoir water rights are administered by the Army Corps of Engineers under Missouri River mainstem operating rules. The Montana DNRC WRQS provides access to the county’s water rights records.

Hay & Winter Feed

Irrigated alfalfa and grass hay along the Milk River corridor and on scattered irrigated parcels provide the primary local hay supply. Dryland hay is minimal given the 11- to 13-inch average precipitation. Many cattle operations supplement with grain, crop residue grazing on wheat stubble, and purchased hay. In drought years when Milk River allocations are curtailed, the local hay supply contracts sharply and freight costs for imported hay become a significant burden.

Cattle Production

Cow-calf operations in Valley County run on native range in the Missouri River breaks, on the plains north of the Milk River, and on irrigated pasture along the Milk River valley. The breaks country south of Glasgow, above Fort Peck Reservoir, provides extensive summer and fall grazing. Fall-weaned calves typically sell through Glasgow sale facilities or through order buyers who ship to feedlots in the Dakotas, Nebraska, and Iowa. Some calves move to Canadian feedlots.

County Logistics

Glasgow sits on U.S. Highway 2 (the Hi-Line), approximately 270 miles northeast of Great Falls and 300 miles northeast of Billings. There is no Interstate access — Highway 2 and Montana Highway 24 (south to Jordan/Circle) are the primary routes. The BNSF Railway mainline runs through Glasgow, providing rail options. Trucking to Billings livestock markets is a full-day proposition at approximately 5 to 5.5 hours. Glasgow’s airport (formerly the AFB) can handle large aircraft, and the town serves as the regional commercial center for a wide area of northeastern Montana.

Data Sources

• USDA Drought Monitor — weekly county drought classification
• USGS Water Services — Milk River at Nashua (06174500) daily discharge
• Montana Mesonet (UMT) — soil moisture (1 station)
• NOAA NCEI Climate at a Glance — county precipitation anomaly (1/3/12 month)
• USDA NASS — county cattle inventory and agricultural census
• Army Corps of Engineers — Fort Peck Reservoir / Missouri River operations
• Bureau of Reclamation — Milk River Project