Carmen Reservoir over Mckenzie River
Linn County, Oregon · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Carmen Reservoir over Mckenzie River in Linn County, Oregon, 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 2010, making it 15 years old at the 2025 inventory.
- It carries about 29 vehicles a day (traffic count year 2020).
- It is one of 106 of the 564 inventoried bridges in Linn County rated good (18.8%); 95 (16.8%) 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 July 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 → (44.34073, -122.00295)
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 | Prestressed concrete tee beam |
| Length | about 115 ft |
| Location | 5.0 Mi S Jct HWY.20 & 126 |
| NBI structure number | 21354 000 00000 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | July 2024 |
| 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 Linn County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Dever-Conner Road over I-5 (Hwy 1) | 1958 | 66,723 | Fair |
| I-5 (hwy 1) over Truax Creek | 1947 | 66,382 | Fair |
| I-5 (hwy 1) NB over Knox Butte Road | 1958 | 34,103 | Fair |
| I-5 (hwy 1) NB over Or 99E (hwy 058) NB | 1958 | 34,103 | Fair |
| I-5 (hwy 1) SB over Knox Butte Road | 1958 | 34,103 | Fair |
| I-5 (hwy 1) SB over Or 99E (hwy 58) NB | 1958 | 34,103 | Fair |
All bridges nearby: Linn County, OR bridge conditions · every bridge in Linn County · Oregon bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.