US Bridges

Jones Road over Salmon Creek

Good

Thurston County, Washington · 0.47 M S of 93rd Ave SW · Structure no. 089171000000000

Built
2020
5 years old
Condition
Good
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
50 ft
1 main span
Daily traffic
659
2020 count
Owner
County
County Highway Agency

About this bridge

Jones Road over Salmon Creek is a steel stringer/multi-beam or girder carrying Jones Road over Salmon Creek in Thurston County, Washington. It was built in 2020, so it is 5 years old, younger 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 659 vehicles a day, roughly 5% of them trucks, projected to reach 1,018 by 2042. The structure is 50 ft (15.2 m) long and 24 ft wide. If it were closed, the detour would be 49.7 mi (80 km).

CarriesJones Road
CrossesSalmon Creek
Location0.47 M S of 93rd Ave SW
RouteCounty Highway 12460
Coordinates46.94589, -122.96064
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation8: Equal to present desirable criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48 US tons
Inventory rating37 US tons

Structure

MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHL 93
Structure length50 ft (15.2 m)
Longest span48 ft (14.6 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic659 (2020)
Projected traffic1,018 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed49.7 mi (80 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$2.2 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Jones Road over Salmon Creek built?

It was built in 2020, making it 5 years old in 2025.

What condition is Jones Road over Salmon Creek 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 July 2024.

How much traffic does Jones Road over Salmon Creek carry?

About 659 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is Jones Road over Salmon Creek?

The structure is 50 ft (15.2 m) long with a longest span of 48 ft (14.6 m) and a deck 24 ft wide.

Who owns Jones Road over Salmon Creek?

It is owned by the County Highway Agency.