US Bridges

Lower Diamond Road over Bear Creek

Good

Wallowa County, Oregon · 2.9 MI W JCT Ore 82 · Structure no. 09911 788 00295

Built
1970
55 years old
Condition
Good
inspected September 2024
Type
Channel Beam
Prestressed Concrete
Length
71 ft
1 main span
Daily traffic
221
2020 count
Owner
County
County Highway Agency

About this bridge

Lower Diamond Road over Bear Creek is a prestressed concrete channel beam carrying Lower Diamond Road over Bear Creek in Wallowa County, Oregon. It was built in 1970, so it is 55 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 221 vehicles a day, roughly 10% of them trucks, projected to reach 261 by 2025. The structure is 71 ft (21.6 m) long and 36 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesLower Diamond Road
CrossesBear Creek
Location2.9 MI W JCT Ore 82
RouteCounty Highway 0
StateOregon
Coordinates45.57494, -117.5467
Functional classRural Minor 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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating69.3 US tons
Inventory rating53.6 US tons

Structure

Structure typeChannel Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length71 ft (21.6 m)
Longest span70 ft (21.3 m)
Deck width36 ft (11.1 m)
Roadway width34 ft (10.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic221 (2020)
Projected traffic261 by 2025
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 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 Lower Diamond Road over Bear Creek built?

It was built in 1970, making it 55 years old in 2025.

What condition is Lower Diamond Road over Bear Creek 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 September 2024.

How much traffic does Lower Diamond Road over Bear Creek carry?

About 221 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Lower Diamond Road over Bear Creek?

The structure is 71 ft (21.6 m) long with a longest span of 70 ft (21.3 m) and a deck 36 ft wide.

Who owns Lower Diamond Road over Bear Creek?

It is owned by the County Highway Agency.