US Bridges

O.B. Riley Road over Deschutes River

Fair

Deschutes County, Oregon · In Tumalo State Park · Structure no. 03378 A08 00300

Built
1971
54 years old
Condition
Fair
inspected March 2024
Type
Slab
Concrete Continuous
Length
151 ft
3 main spans
Daily traffic
1,404
2020 count
Owner
County
County Highway Agency

About this bridge

O.B. Riley Road over Deschutes River is a concrete continuous slab carrying O.B. Riley Road over Deschutes River in Deschutes County, Oregon. It was built in 1971, so it is 54 years old, older than the Oregon average of 49.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 1,404 vehicles a day, roughly 7% of them trucks, projected to reach 1,619 by 2025. The structure is 151 ft (46 m) long and 40 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesO.B. Riley Road
CrossesDeschutes River
LocationIn Tumalo State Park
RouteCounty Highway 3102
CountyDeschutes County
StateOregon
Coordinates44.12947, -121.33147
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to 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 rating45.3 US tons
Inventory rating35.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length151 ft (46 m)
Longest span60 ft (18.3 m)
Deck width40 ft (12.2 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,404 (2020)
Projected traffic1,619 by 2025
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 O.B. Riley Road over Deschutes River built?

It was built in 1971, making it 54 years old in 2025.

What condition is O.B. Riley Road over Deschutes River in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in March 2024.

How much traffic does O.B. Riley Road over Deschutes River carry?

About 1,404 vehicles per day (2020 count), of which roughly 7% are trucks.

How long is O.B. Riley Road over Deschutes River?

The structure is 151 ft (46 m) long with a longest span of 60 ft (18.3 m) and a deck 40 ft wide.

Who owns O.B. Riley Road over Deschutes River?

It is owned by the County Highway Agency.