US Bridges

C-685 Non-Fa over Powder R (mccarty Br Rd)

Good

Baker County, Oregon · 027 MI E JCT Old HWY 30 · Structure no. 16716 685 00270

Built
1984
41 years old
Condition
Good
inspected June 2023
Type
Slab
Prestressed Concrete
Length
61 ft
1 main span
Daily traffic
38
2020 count
Owner
County
County Highway Agency

About this bridge

C-685 Non-Fa over Powder R (mccarty Br Rd) is a prestressed concrete slab carrying C-685 Non-Fa over Powder R (mccarty Br Rd) in Baker County, Oregon. It was built in 1984, so it is 41 years old, younger than the Oregon average of 49.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 38 vehicles a day, roughly 2% of them trucks, projected to reach 44 by 2025. The structure is 61 ft (18.6 m) long and 24 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

CarriesC-685 Non-Fa
CrossesPowder R (mccarty Br Rd)
Location027 MI E JCT Old HWY 30
RouteCounty Highway CO685
StateOregon
Coordinates44.97243, -117.88296
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58.2 US tons
Inventory rating45 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length61 ft (18.6 m)
Longest span60 ft (18.3 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic38 (2020)
Projected traffic44 by 2025
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was C-685 Non-Fa over Powder R (mccarty Br Rd) built?

It was built in 1984, making it 41 years old in 2025.

What condition is C-685 Non-Fa over Powder R (mccarty Br Rd) in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in June 2023.

How much traffic does C-685 Non-Fa over Powder R (mccarty Br Rd) carry?

About 38 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is C-685 Non-Fa over Powder R (mccarty Br Rd)?

The structure is 61 ft (18.6 m) long with a longest span of 60 ft (18.3 m) and a deck 24 ft wide.

Who owns C-685 Non-Fa over Powder R (mccarty Br Rd)?

It is owned by the County Highway Agency.