US Bridges

SR 507 over Tacoma Rail RR

Fair

Thurston County, Washington · 1.8 N JCT SR 510 · Structure no. 0012179A0000000

Built
1982
43 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
159 ft
3 main spans
Daily traffic
15,046
2023 count
Owner
State
State Highway Agency

About this bridge

SR 507 over Tacoma Rail RR is a prestressed concrete continuous stringer/multi-beam or girder carrying SR 507 over Tacoma Rail RR in Thurston County, Washington. It was built in 1982, so it is 43 years old, younger 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 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 15,046 vehicles a day, roughly 5% of them trucks, projected to reach 22,105 by 2039. The structure is 159 ft (48.5 m) long and 38 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesSR 507
CrossesTacoma Rail RR
Location1.8 N JCT SR 510
RouteState Highway 507
CountyThurston County
StateWashington
Coordinates46.93283, -122.57287
Functional classUrban 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating73 US tons
Inventory rating43 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length159 ft (48.5 m)
Longest span60 ft (18.3 m)
Deck width38 ft (11.5 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,046 (2023)
Projected traffic22,105 by 2039
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed3.1 mi (5 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$2.9 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR 507 over Tacoma Rail RR built?

It was built in 1982, making it 43 years old in 2025.

What condition is SR 507 over Tacoma Rail RR 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 September 2023.

How much traffic does SR 507 over Tacoma Rail RR carry?

About 15,046 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is SR 507 over Tacoma Rail RR?

The structure is 159 ft (48.5 m) long with a longest span of 60 ft (18.3 m) and a deck 38 ft wide.

Who owns SR 507 over Tacoma Rail RR?

It is owned by the State Highway Agency.