US Bridges

Rhea Road over Willow Creek EB

Good

Gilliam County, Oregon · 0.05 MI W of HWY 74 · Structure no. 21C01 452 00005

Built
1987
38 years old
Condition
Good
inspected July 2023
Type
Slab
Prestressed Concrete
Length
71 ft
1 main span
Daily traffic
10
2020 count
Owner
County
County Highway Agency

About this bridge

Rhea Road over Willow Creek EB is a prestressed concrete slab carrying Rhea Road over Willow Creek EB in Gilliam County, Oregon. It was built in 1987, so it is 38 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 10 vehicles a day, roughly 5% of them trucks, projected to reach 10 by 2025. The structure is 71 ft (21.6 m) long and 24 ft wide. If it were closed, the detour would be 21.1 mi (34 km).

CarriesRhea Road
CrossesWillow Creek EB
Location0.05 MI W of HWY 74
RouteCounty Highway 0
StateOregon
Coordinates45.7131, -120.0343
Functional classRural Major Collector

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 inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
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 rating98 US tons
Inventory rating59 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 25 or greater
Structure length71 ft (21.6 m)
Longest span70 ft (21.3 m)
Deck width24 ft (7.4 m)
Roadway width23 ft (6.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10 (2020)
Projected traffic10 by 2025
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed21.1 mi (34 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 Rhea Road over Willow Creek EB built?

It was built in 1987, making it 38 years old in 2025.

What condition is Rhea Road over Willow Creek EB 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 July 2023.

How much traffic does Rhea Road over Willow Creek EB carry?

About 10 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is Rhea Road over Willow Creek EB?

The structure is 71 ft (21.6 m) long with a longest span of 70 ft (21.3 m) and a deck 24 ft wide.

Who owns Rhea Road over Willow Creek EB?

It is owned by the County Highway Agency.