US Bridges

County Road 92310 over Duck Creek

Fair

Lincoln County, Washington · .12 Mi. E SR 21 · Structure no. 080241000000000

Built
1935
90 years old, rebuilt 1968
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
65 ft
2 main spans
Daily traffic
186
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

County Road 92310 over Duck Creek is a steel stringer/multi-beam or girder carrying County Road 92310 over Duck Creek in Lincoln County, Washington. It was built in 1935 and reconstructed in 1968, so it is 90 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 186 vehicles a day, roughly 40% of them trucks, projected to reach 226 by 2042. The structure is 65 ft (19.8 m) long and 25 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

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CarriesCounty Road 92310
CrossesDuck Creek
Location.12 Mi. E SR 21
RouteCounty Highway 92310
CountyLincoln County
StateWashington
Coordinates47.3375, -118.68619
Functional classRural Major Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating33.6 US tons
Inventory rating25.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans2
Design loadHS 20
Structure length65 ft (19.8 m)
Longest span33 ft (10.1 m)
Deck width25 ft (7.6 m)
Roadway width25 ft (7.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic186 (2020)
Projected traffic226 by 2042
Trucks40%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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$2.7 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County Road 92310 over Duck Creek built?

It was built in 1935, making it 90 years old in 2025. It was reconstructed in 1968.

What condition is County Road 92310 over Duck 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 October 2024.

How much traffic does County Road 92310 over Duck Creek carry?

About 186 vehicles per day (2020 count), of which roughly 40% are trucks.

How long is County Road 92310 over Duck Creek?

The structure is 65 ft (19.8 m) long with a longest span of 33 ft (10.1 m) and a deck 25 ft wide.

Who owns County Road 92310 over Duck Creek?

It is owned by the City or Municipal Highway Agency.