US Bridges

Twin Br RD over Deschutes Rv/Twin Br

Fair

Deschutes County, Oregon · 00.47 MI West Swally RD · Structure no. 16479 B33C00047

Built
1981
44 years old
Condition
Fair
inspected February 2023
Type
Slab
Prestressed Concrete
Length
104 ft
2 main spans
Daily traffic
319
2020 count
Owner
County
County Highway Agency

About this bridge

Twin Br RD over Deschutes Rv/Twin Br is a prestressed concrete slab carrying Twin Br RD over Deschutes Rv/Twin Br in Deschutes County, Oregon. It was built in 1981, so it is 44 years old, younger 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 5 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 319 vehicles a day, roughly 2% of them trucks, projected to reach 363 by 2025. The structure is 104 ft (31.7 m) long and 32 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesTwin Br RD
CrossesDeschutes Rv/Twin Br
Location00.47 MI West Swally RD
RouteCounty Highway 1140
CountyDeschutes County
StateOregon
Coordinates44.18166, -121.31745
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating50.4 US tons
Inventory rating38.9 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckOther
Main spans2
Design loadHS 20
Structure length104 ft (31.7 m)
Longest span51 ft (15.5 m)
Deck width32 ft (9.8 m)
Roadway width31 ft (9.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic319 (2020)
Projected traffic363 by 2025
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Twin Br RD over Deschutes Rv/Twin Br built?

It was built in 1981, making it 44 years old in 2025.

What condition is Twin Br RD over Deschutes Rv/Twin Br 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 February 2023.

How much traffic does Twin Br RD over Deschutes Rv/Twin Br carry?

About 319 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Twin Br RD over Deschutes Rv/Twin Br?

The structure is 104 ft (31.7 m) long with a longest span of 51 ft (15.5 m) and a deck 32 ft wide.

Who owns Twin Br RD over Deschutes Rv/Twin Br?

It is owned by the County Highway Agency.