Bridge conditions in Cass County, North Dakota
369 inventoried bridges · 12 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
12 of the 369 bridges the federal inventory lists in Cass County are rated poor; the rest split 198 good and 159 fair.
- 12 of the 369 bridges in Cass County, North Dakota, are rated in poor condition (3.3%) in the 2025 National Bridge Inventory, as of .
- 198 bridges (53.7%) are rated good and 159 (43.1%) fair.
- The median Cass County bridge was built in 1992.
- The busiest poor-rated bridge is Nd Highway 10 over Swan Creek (built 1959), carrying about 210 vehicles a day.
Good 53.7% · Fair 43.1% · Poor 3.3% of 369 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 |
|---|---|---|---|
| Nd Highway 10 over Swan Creek | 1959 | 210 | Poor |
| County Highway over Sheyenne River | 1979 | 140 | Poor |
| County Highway over Red River of the North | 1949 | 90 | Poor |
| County Highway over Creek | 1976 | 24 | Poor |
| County Highway over Maple River | 1950 | 20 | Poor |
| County Highway over Swan Creek | 1955 | 20 | Poor |
| County Highway over Co Drain 15 | 1955 | 20 | Poor |
| County Highway over Rush River | 1972 | 20 | Poor |
| County Highway over County Drain 12 | 1961 | 20 | Poor |
| County Highway over I-94/MAPLE River Sep | 1960 | 20 | Poor |
| County Highway over Rush River | 1945 | 10 | Poor |
| County Highway over Branch of Elm River | 1968 | 10 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| 45TH Street Fargo over I-94/45TH Street Intchg. | 1991 | 50,840 | Fair |
| Ramp to I-94 EB over I-29 I-94 | 1993 | 49,800 | Fair |
| Interstate 94 over US 81 | 1993 | 49,800 | Fair |
| Interstate 94 over 5TH St Separation | 1993 | 49,800 | Fair |
| Interstate 94 over Interstate 29 | 2003 | 48,335 | Fair |
| Interstate 94 over Interstate 29 | 2003 | 48,335 | Good |
| 9TH St.west Fargo over I-94/9TH St.interchange | 2009 | 25,100 | Good |
| Interstate 94 over Red River of the North | 1959 | 24,900 | Fair |
| Interstate 94 over Red River of the North | 1959 | 24,900 | Fair |
| US 10/MAIN Avenue over US 81/10TH Street | 1938 | 24,100 | Fair |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
All of North Dakota: North Dakota 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.