US Bridges

SR 507 over Deschutes River

Fair

Thurston County, Washington · 15.0 N Lewis CO · Structure no. 0002796A0000000

Built
1943
82 years old, rebuilt 1952
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
202 ft
3 main spans
Daily traffic
5,190
2023 count
Owner
State
State Highway Agency

About this bridge

SR 507 over Deschutes River is a steel continuous stringer/multi-beam or girder carrying SR 507 over Deschutes River in Thurston County, Washington. It was built in 1943 and reconstructed in 1952, so it is 82 years old, older than the Washington average of 49.8 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 5,190 vehicles a day, roughly 13% of them trucks, projected to reach 7,370 by 2039. The structure is 202 ft (61.6 m) long and 32 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesSR 507
CrossesDeschutes River
Location15.0 N Lewis CO
RouteState Highway 507
CountyThurston County
StateWashington
Coordinates46.87279, -122.7308
Functional classRural Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating87 US tons
Inventory rating46 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckWood or timber
Main spans3
Design loadH 15
Structure length202 ft (61.6 m)
Longest span86 ft (26.2 m)
Deck width32 ft (9.7 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,190 (2023)
Projected traffic7,370 by 2039
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed8.7 mi (14 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$3.6 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 507 over Deschutes River built?

It was built in 1943, making it 82 years old in 2025. It was reconstructed in 1952.

What condition is SR 507 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 February 2024.

How much traffic does SR 507 over Deschutes River carry?

About 5,190 vehicles per day (2023 count), of which roughly 13% are trucks.

How long is SR 507 over Deschutes River?

The structure is 202 ft (61.6 m) long with a longest span of 86 ft (26.2 m) and a deck 32 ft wide.

Who owns SR 507 over Deschutes River?

It is owned by the State Highway Agency.