Shields River Road over Irrigation Canal
Park County, Montana · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Shields River Road over Irrigation Canal in Park County, Montana, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 8 (very good condition) on the 0-9 scale.
- It was built in 2019, making it 6 years old at the 2025 inventory.
- It carries about 100 vehicles a day (traffic count year 2025).
- Its listed owner is the county highway agency.
- It is one of 27 of the 126 inventoried bridges in Park County rated good (21.4%); 13 (10.3%) 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 April 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 → (45.82554, -110.54757)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 8 | 8 | Very good condition |
| Superstructure | 8 | 8 | Very good condition |
| Substructure | 8 | 8 | Very good condition |
Bridge details
| Structure | Concrete slab |
| Length | about 24 ft |
| Location | 5M SE Clyde Park |
| NBI structure number | 000000202008006 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | April 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 Montana department of transportation.
Busiest bridges in Park County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I 90 over Int West Livingston | 1962 | 9,461 | Fair |
| I 90 over Int West Livingston | 1962 | 9,461 | Fair |
| I 90 over Int S Livingston-us Hwy | 1962 | 9,461 | Fair |
| I 90 over Quinn Creek Road | 2022 | 8,272 | Good |
| I 90 over Quinn Creek Road | 2022 | 8,272 | Good |
| I 90 over Int Hopper | 1978 | 8,236 | Fair |
All bridges nearby: Park County, MT bridge conditions · every bridge in Park County · Montana bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.