US Bridges

Washington ST over Rock Creek

FairPosted for load

Lincoln County, Washington · 0.04 W SR 231 · Structure no. 080564000000000

Built
1972
53 years old
Condition
Fair
inspected December 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
33 ft
1 main span
Daily traffic
43
2023 count
Owner
County
County Highway Agency

About this bridge

Washington ST over Rock Creek is a steel stringer/multi-beam or girder carrying Washington ST over Rock Creek in Lincoln County, Washington. It was built in 1972, so it is 53 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. Its operating status is: posted for load restriction.

It carries about 43 vehicles a day, roughly 40% of them trucks, projected to reach 92 by 2042. The structure is 33 ft (10.1 m) long and 19 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesWashington ST
CrossesRock Creek
Location0.04 W SR 231
RouteCounty Highway 39010
Coordinates47.50522, -117.94956
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2023
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating19 US tons
Inventory rating14.7 US tons

Structure

MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 20
Structure length33 ft (10.1 m)
Longest span28 ft (8.5 m)
Deck width19 ft (5.8 m)
Roadway width19 ft (5.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic43 (2023)
Projected traffic92 by 2042
Trucks40%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 Washington ST over Rock Creek built?

It was built in 1972, making it 53 years old in 2025.

What condition is Washington ST over Rock Creek 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 December 2023.

How much traffic does Washington ST over Rock Creek carry?

About 43 vehicles per day (2023 count), of which roughly 40% are trucks.

How long is Washington ST over Rock Creek?

The structure is 33 ft (10.1 m) long with a longest span of 28 ft (8.5 m) and a deck 19 ft wide.

Who owns Washington ST over Rock Creek?

It is owned by the County Highway Agency.