Bridge conditions in Morton County, North Dakota
269 inventoried bridges · 26 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
26 of the 269 bridges the federal inventory lists in Morton County are rated poor; the rest split 115 good and 128 fair.
- 26 of the 269 bridges in Morton County, North Dakota, are rated in poor condition (9.7%) in the 2025 National Bridge Inventory, as of .
- 115 bridges (42.8%) are rated good and 128 (47.6%) fair.
- The median Morton County bridge was built in 1970.
- The busiest poor-rated bridge is Irrsr Nd Hway 1806 over Cannonball River (built 1962), carrying about 1,450 vehicles a day.
Good 42.8% · Fair 47.6% · Poor 9.7% of 269 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 |
|---|---|---|---|
| Irrsr Nd Hway 1806 over Cannonball River | 1962 | 1,450 | Poor |
| CR139 over Creek | 1960 | 405 | Poor |
| South Park Street over Branch of Knife River | 1916 | 200 | Poor |
| County Highway 86 over Drainage Area | 1968 | 110 | Poor |
| 67TH Ave SW over Drainage Area | 1971 | 85 | Poor |
| CR138 over Drainage Area | 1973 | 75 | Poor |
| County Highway 83 over Creek | 1979 | 45 | Poor |
| County Highway 90 over Drainage Area | 1968 | 40 | Poor |
| 33RD St over Wilson Creek | 1967 | 30 | Poor |
| 40TH Ave over Creek | 1942 | 30 | Poor |
| 34TH St over Drainage Area | 1968 | 25 | Poor |
| 58TH Avenue over Drainage Area | 1966 | 25 | Poor |
| 34TH Street over Square Butte Creek | 1971 | 25 | Poor |
| 22ND Avenue over SE Br Little Heart River | 1919 | 24 | Poor |
| 33 1/2 St over Drainage Area | 1966 | 20 | Poor |
| County Highway 87 over Hailstone Creek | 1940 | 20 | Poor |
| 45th Ave over Sweet Briar Creek | 1922 | 20 | Poor |
| County Road 82 over Chanta Peta Creek | 1919 | 20 | Poor |
| 17TH Ave over NW Br Cantapeta Creek | 1971 | 20 | Poor |
| 49 1/2 Avenue over Big Muddy Creek | 1940 | 10 | Poor |
| Judson St. over Creek | 1940 | 10 | Poor |
| 38TH St over Drainage Area | 1967 | 5 | Poor |
| 31ST St over Hail Storm Creek | 1966 | 5 | Poor |
| 58TH Street over SE Br Little Heart River | 1971 | 5 | Poor |
| County Highway over Atv Trail | 1960 | 5 | Poor |
| East Fulton Avenue over Branch of Knife River | 1924 | – | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Interstate 94 over Missouri River | 1965 | 24,125 | Fair |
| Interstate 194 over Business Loop 94 | 1981 | 18,200 | Fair |
| I-94 Business Loop over West Midway Separation | 1965 | 16,750 | Fair |
| Interstate 94 over East Midway Interchange | 1965 | 9,100 | Fair |
| Interstate 194 over Business 94 | 1981 | 9,100 | Fair |
| Interstate 194 over Business 94 | 1981 | 9,100 | Fair |
| Interstate 94 over Refinery Road Interchang | 1964 | 7,750 | Fair |
| Interstate 94 over Refinery Road Interchang | 1964 | 7,750 | Fair |
| Interstate 94 over Bnrr and Missouri Road | 1964 | 7,750 | Fair |
| Interstate 94 over Bnrr and Missouri Road | 1964 | 7,750 | 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.