77 1/2 Ave. over Heart River

Grant County, North Dakota · rated Fair in the 2025 National Bridge Inventory

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

• 77 1/2 Ave. over Heart River in Grant County, North Dakota, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
• Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
• It was built in 1958, making it 67 years old at the 2025 inventory.
• It carries about 50 vehicles a day (traffic count year 2022).
• Its listed owner is the county highway agency.
• It is one of 30 of the 59 inventoried bridges in Grant County rated fair (50.8%); 6 (10.2%) are rated poor.
• A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.

View this bridge on a map → (46.65812, -102.07985)

Component ratings

Bridge details

Source: FHWA National Bridge Inventory, 2025 data as reported by the North Dakota department of transportation.

Busiest bridges in Grant County

All bridges nearby: Grant County, ND bridge conditions · every bridge in Grant County · North Dakota bridges.

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