County Rd 1105 over Mitchell Canal
Malheur County, Oregon · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- County Rd 1105 over Mitchell Canal in Malheur County, Oregon, 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 1984, making it 41 years old at the 2025 inventory.
- It carries about 157 vehicles a day (traffic count year 2020).
- Its listed owner is the county highway agency.
- It is one of 121 of the 181 inventoried bridges in Malheur County rated fair (66.9%); 3 (1.7%) are rated poor.
- Its traffic status in the 2025 inventory is open, posting recommended but not legally implemented (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated October 2023, on a 24-month routine inspection cycle.
- 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 → (43.78329, -117.1552)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Prestressed concrete channel beam |
| Length | about 24 ft |
| Location | 001 Mi So Jct Fas B487 |
| NBI structure number | 45C204110500079 |
| Condition class | Fair |
| Traffic status (item 41) | Open, posting recommended but not legally implemented |
| Last inspection (item 90) | October 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | U: unknown foundation, not evaluated for scour |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Oregon department of transportation.
Busiest bridges in Malheur County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 30 (hwy 493) over Snake R. (hwy 493) | 1967 | 26,880 | Good |
| US 30 (hwy 493) over I-84 (hwy 6 Mp 376.72) | 1998 | 26,810 | Fair |
| Or 201 (hwy 455) over Malheur River | 1976 | 13,346 | Fair |
| Or 201 (hwy 455) over I-84 (hwy 6 Mp 374.55) | 2008 | 13,346 | Good |
| I-84 (hwy 006) over Owyhee Canal | 1955 | 13,133 | Good |
| I-84 (hwy 006) EB over Snake River | 1960 | 12,977 | Fair |
All bridges nearby: Malheur County, OR bridge conditions · every bridge in Malheur County · Oregon bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.