Bridge conditions in Oliver County, North Dakota
23 inventoried bridges · 1 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
1 of the 23 bridges the federal inventory lists in Oliver County are rated poor; the rest split 11 good and 11 fair.
- 1 of the 23 bridges in Oliver County, North Dakota, are rated in poor condition (4.3%) in the 2025 National Bridge Inventory, as of .
- 11 bridges (47.8%) are rated good and 11 (47.8%) fair.
- The median Oliver County bridge was built in 1978.
- The busiest poor-rated bridge is Nd Highway 200 over Creek (built 1971), carrying about 940 vehicles a day.
Good 47.8% · Fair 47.8% · Poor 4.3% of 23 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 200 over Creek | 1971 | 940 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Nd Highway 200 over Missouri River | 1971 | 1,430 | Fair |
| Nd Highway 200 over Creek | 1970 | 1,140 | Fair |
| Nd Highway 200 over Creek | 1971 | 940 | Poor |
| Nd Highway over Creek | 1976 | 670 | Good |
| Nd Highway over Square Butte Creek | 1987 | 650 | Good |
| Nd Highway over Br. Square Butte Creek | 1948 | 560 | Fair |
| Nd Highway 48 over Creek | 1970 | 530 | Fair |
| 36th Avenue SW over Square Butte Creek | 1982 | 385 | Good |
| 35TH Ave SW over 23 1/2 Street SW | 1993 | 385 | Good |
| 28th Avenue SW over Creek | 1993 | 380 | Good |
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.