US Bridges

County RD 866 over Powder R (hughes Ln)

Good

Baker County, Oregon · 0.7 MI E JCT US 30 · Structure no. 09570 866 00070

Built
1966
59 years old
Condition
Good
inspected October 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
78 ft
1 main span
Daily traffic
2,854
2020 count
Owner
County
County Highway Agency

About this bridge

County RD 866 over Powder R (hughes Ln) is a prestressed concrete box beam or girders - multiple carrying County RD 866 over Powder R (hughes Ln) in Baker County, Oregon. It was built in 1966, so it is 59 years old, older 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 2,854 vehicles a day, roughly 4% of them trucks, projected to reach 3,134 by 2025. The structure is 78 ft (23.8 m) long and 38 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

CarriesCounty RD 866
CrossesPowder R (hughes Ln)
Location0.7 MI E JCT US 30
RouteCounty Highway 4950
StateOregon
Coordinates44.7961, -117.8294
Functional classUrban Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length78 ft (23.8 m)
Longest span78 ft (23.8 m)
Deck width38 ft (11.6 m)
Roadway width32 ft (9.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,854 (2020)
Projected traffic3,134 by 2025
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed2.5 mi (4 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 County RD 866 over Powder R (hughes Ln) built?

It was built in 1966, making it 59 years old in 2025.

What condition is County RD 866 over Powder R (hughes Ln) 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 October 2024.

How much traffic does County RD 866 over Powder R (hughes Ln) carry?

About 2,854 vehicles per day (2020 count), of which roughly 4% are trucks.

How long is County RD 866 over Powder R (hughes Ln)?

The structure is 78 ft (23.8 m) long with a longest span of 78 ft (23.8 m) and a deck 38 ft wide.

Who owns County RD 866 over Powder R (hughes Ln)?

It is owned by the County Highway Agency.