US Highway 85 over Little Muddy River
Williams County, North Dakota · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- US Highway 85 over Little Muddy River in Williams County, North Dakota, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the superstructure, rated 4 (poor condition) on the 0-9 scale.
- It was built in 2016, making it 9 years old at the 2025 inventory.
- It carries about 3,075 vehicles a day (traffic count year 2019).
- Its listed owner is the state highway agency.
- It is one of 23 of the 99 inventoried bridges in Williams County rated poor (23.2%); 23 (23.2%) are rated poor.
- A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.
View this bridge on a map → (48.55726, -103.62444)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 6 | Satisfactory condition |
| Superstructure | 4 | Poor condition |
| Substructure | 7 | Good condition |
Bridge details
| Structure | Prestressed concrete single box beam |
| Length | about 216 ft |
| Location | 1 South of Nd 50 |
| NBI structure number | 0085216118 |
| Condition class | Poor |
Source: FHWA National Bridge Inventory, 2025 data as reported by the North Dakota department of transportation.
Busiest bridges in Williams County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US Highway 2 over 18 th ST W | 2014 | 22,230 | Good |
| US Highway 2 over Creek | 2017 | 21,780 | Good |
| US Highway 2 over Creek | 1955 | 9,520 | Good |
| 11TH St West over Sand Creek | 2015 | 7,110 | Good |
| US Highway 85 over Creek | 2017 | 6,440 | Good |
| US Highway 85 over Camp Creek | 2012 | 6,440 | Good |
All bridges nearby: Williams County, ND bridge conditions · every bridge in Williams County · North Dakota bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.