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Bridge conditions in Hill County, Montana

46 inventoried bridges · 3 rated poor · 2025 National Bridge Inventory

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

3 of the 46 bridges the federal inventory lists in Hill County are rated poor; the rest split 27 good and 16 fair.

3 of the 46 bridges in Hill County, Montana, are rated in poor condition (6.5%) in the 2025 National Bridge Inventory, as of August 20, 2026.
27 bridges (58.7%) are rated good and 16 (34.8%) fair.
The median Hill County bridge was built in 1984.
The busiest poor-rated bridge is Irr Route 46 over Big Sandy Creek (built 1963), carrying about 100 vehicles a day.

Good 58.7% · Fair 34.8% · Poor 6.5% of 46 bridges

Bridges rated poor

Every bridge in the county with a poor rating, busiest first. Poor means a major component is rated 4 or lower on FHWA's 0-9 scale; it is a repair flag, not a closure notice.

Bridge	Built	Vehicles/day	Condition
Irr Route 46 over Big Sandy Creek	1963	100	Poor
Road 290 N over Canadian Coulee 036	1980	100	Poor
48TH St W over Beaver Creek 046	1966	100	Poor

Busiest bridges in the county

Bridge	Built	Vehicles/day	Condition
US 2 over Little Box Elder Creek	2011	3,678	Good
US 2 over Drainage	2011	3,678	Good
US 2 over RR	1960	3,539	Fair
7TH Ave N over RR	1936	3,404	Fair
US 87 over Beaver Creek	1966	2,982	Good
7TH Ave N over Milk River	1973	2,952	Good
US 87 over Gravel Coulee	1954	1,881	Fair
Irr - US 87 over Box Elder Creek	1969	1,694	Good
US 2 over Big Sandy Creek	1954	1,506	Good
Irr Bia Rte 2 over Box Elder Creek	1992	1,400	Fair

Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.

All of Montana: Montana bridge conditions by county · every download on the data page.

Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.