US Bridges

SR 510 over BNSF Railroad

Good

Thurston County, Washington · 4.1 E JCT I-5 · Structure no. 0008628B0000000

Built
1970
55 years old
Condition
Good
inspected September 2021
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
189 ft
3 main spans
Daily traffic
13,225
2023 count
Owner
State
State Highway Agency

About this bridge

SR 510 over BNSF Railroad is a prestressed concrete continuous stringer/multi-beam or girder carrying SR 510 over BNSF Railroad in Thurston County, Washington. It was built in 1970, so it is 55 years old, older than the Washington average of 49.8 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 13,225 vehicles a day, roughly 4% of them trucks, projected to reach 19,429 by 2039. The structure is 189 ft (57.6 m) long and 35 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

CarriesSR 510
CrossesBNSF Railroad
Location4.1 E JCT I-5
RouteState Highway 510
Coordinates47.02207, -122.7275
Functional classUrban Minor Arterial

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.
Last inspectionSeptember 2021
Inspection intervalevery 48 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 alignment6: Equal to present minimum criteria
Operating rating87 US tons
Inventory rating52 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length189 ft (57.6 m)
Longest span63 ft (19.2 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,225 (2023)
Projected traffic19,429 by 2039
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed8.1 mi (13 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$2.4 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR 510 over BNSF Railroad built?

It was built in 1970, making it 55 years old in 2025.

What condition is SR 510 over BNSF Railroad 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 September 2021.

How much traffic does SR 510 over BNSF Railroad carry?

About 13,225 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is SR 510 over BNSF Railroad?

The structure is 189 ft (57.6 m) long with a longest span of 63 ft (19.2 m) and a deck 35 ft wide.

Who owns SR 510 over BNSF Railroad?

It is owned by the State Highway Agency.