Nd Highway 13 over Bois De Sioux River
Richland County, North Dakota · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Nd Highway 13 over Bois De Sioux River in Richland County, North Dakota, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1929 and reconstructed in 1987, making it 96 years old at the 2025 inventory.
- It carries about 15,200 vehicles a day (traffic count year 2019).
- Its listed owner is the state highway agency.
- It is one of 102 of the 196 inventoried bridges in Richland County rated fair (52.0%); 24 (12.2%) 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 January 2024, on a 24-month routine inspection cycle.
- It is coded scour critical (NBI item 113 = 3): scour critical: foundations unstable for the assessed or calculated scour.
- 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 → (46.2638, -96.59913)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 5 | 5 | Fair condition |
Bridge details
| Structure | Continuous prestressed concrete single box beam |
| Length | about 171 ft |
| Location | City of Wahpeton |
| NBI structure number | 0013391615 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | January 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 3: scour critical: foundations unstable for the assessed or calculated scour |
Source: FHWA National Bridge Inventory, 2025 data as reported by the North Dakota department of transportation.
Busiest bridges in Richland County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Nd Highway 13 over Drain 18 | 1973 | 6,300 | Fair |
| Interstate 29 over County Drain 2 | 1973 | 5,600 | Good |
| Interstate 29 over County Drain | 1973 | 5,600 | Good |
| Nd Highway 13 over Small Creek | 1973 | 5,530 | Fair |
| Nd Highway 13 over Creek | 1973 | 5,170 | Good |
| Interstate 29 over County Drain 32 | 1973 | 5,100 | Good |
All bridges nearby: Richland County, ND bridge conditions · every bridge in Richland County · North Dakota bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.