Irr - US 212 over Muddy Creek
Big Horn County, Montana · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Irr - US 212 over Muddy Creek in Big Horn County, Montana, 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 1974, making it 51 years old at the 2025 inventory.
- It carries about 2,811 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 38 of the 133 inventoried bridges in Big Horn County rated good (28.6%); 5 (3.8%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- It was rated fair in the 2024 inventory and is now good (deck 6 to 7, substructure 6 to 7).
- Its most recent inspection on record is dated March 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 → (45.62009, -106.76243)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 7 | Good condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 6 | 7 | Good condition |
Bridge details
| Structure | Prestressed concrete stringer or multi-beam girder |
| Length | about 94 ft |
| Location | 5M W Lame Deer |
| NBI structure number | P00037036+07611 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | March 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 5: foundations stable, scour within the limits of the footing or piles |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Montana department of transportation.
Busiest bridges in Big Horn County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I 90 over Irrigation Canal | 1971 | 8,516 | Fair |
| Irr-s 47 over Int W Hardin I 90 | 1970 | 5,396 | Fair |
| Irr - I 90 over Int Dunmore | 1959 | 4,473 | Fair |
| Irr - I 90 over Int Dunmore | 1959 | 4,473 | Fair |
| Irr - I 90 over Bighorn River | 1971 | 4,258 | Good |
| Irr - I 90 over Bighorn River | 1971 | 4,258 | Fair |
All bridges nearby: Big Horn County, MT bridge conditions · every bridge in Big Horn County · Montana bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.