Hwy 370 over Pilot Butte Canal
Deschutes County, Oregon · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Hwy 370 over Pilot Butte Canal in Deschutes County, Oregon, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1961, making it 64 years old at the 2025 inventory.
- It carries about 3,656 vehicles a day (traffic count year 2022).
- Its listed owner is the state highway agency.
- It is one of 76 of the 156 inventoried bridges in Deschutes County rated fair (48.7%); 2 (1.3%) 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 March 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 → (44.3127, -121.16721)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 6 | 6 | Satisfactory condition |
| Substructure | 5 | 5 | Fair condition |
Bridge details
| Structure | Prestressed concrete slab |
| Length | about 20 ft |
| Location | 002 Mi E Hwy 4 Jct |
| NBI structure number | 03379 370 00021 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | March 2023 |
| 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 Oregon department of transportation.
Busiest bridges in Deschutes County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 97 (hwy 004) over Division St | 1997 | 55,763 | Fair |
| US 97 (hwy 004) over Revere Ave | 1997 | 55,763 | Good |
| US 97 (hwy 004) over Olney Ave | 1997 | 55,763 | Good |
| US 97 (hwy 004) over Butler Mkt. Rd. | 1997 | 50,050 | Fair |
| US 97 (hwy 004) over 3RD Street | 1997 | 50,050 | Fair |
| US 97 (hwy 004) over Colorado Ave and BNSF | 1998 | 43,502 | Good |
All bridges nearby: Deschutes County, OR bridge conditions · every bridge in Deschutes County · Oregon bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.