Nd Highway over Square Butte Creek
Oliver County, North Dakota · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Nd Highway over Square Butte Creek in Oliver County, North Dakota, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
- It was built in 1987, making it 38 years old at the 2025 inventory.
- It carries about 650 vehicles a day (traffic count year 2019).
- Its listed owner is the state highway agency.
- It is one of 11 of the 23 inventoried bridges in Oliver County rated good (47.8%); 1 (4.3%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated July 2024, on a 24-month routine inspection cycle.
- A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.
View this bridge on a map → (47.11123, -101.29962)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Continuous prestressed concrete single box beam |
| Length | about 130 ft |
| Location | at Center |
| NBI structure number | 0025028790 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | July 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
Source: FHWA National Bridge Inventory, 2025 data as reported by the North Dakota department of transportation.
Busiest bridges in Oliver 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 Br. Square Butte Creek | 1948 | 560 | Fair |
| Nd Highway 48 over Creek | 1970 | 530 | Fair |
All bridges nearby: Oliver County, ND bridge conditions · every bridge in Oliver County · North Dakota bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.