Blakeslee Rd over Canal 030
Petroleum County, Montana · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Blakeslee Rd over Canal 030 in Petroleum County, Montana, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1978, making it 47 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 14 of the 26 inventoried bridges in Petroleum County rated fair (53.8%); 4 (15.4%) are rated poor.
- 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 → (47.12338, -108.58836)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 7 | Good condition |
| Superstructure | 7 | Good condition |
| Substructure | 6 | Satisfactory condition |
Bridge details
| Structure | Prestressed concrete slab |
| Length | about 42 ft |
| Location | 7M N Teigen |
| NBI structure number | L35111006+07001 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Montana department of transportation.
Busiest bridges in Petroleum County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| S 200 over Box Elder Creek | 1953 | 539 | Fair |
| S 244 over Mcdonald Creek | 1941 | 245 | Fair |
| S 244 over Pike Creek | 1939 | 233 | Fair |
| S 244 over Drainage | 1935 | 233 | Fair |
| S 244 over Yellow Water Cr-elk CR | 1948 | 233 | Poor |
| S 244 over Drainage | 1940 | 208 | Fair |
All bridges nearby: Petroleum County, MT bridge conditions · every bridge in Petroleum County · Montana bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.