US Bridges

Thorpe Road over Crab Creek

Good

Lincoln County, Washington · 0.02 N Fhs L220 · Structure no. 081278000000000

Built
1900
125 years old, rebuilt 1972
Condition
Good
inspected December 2023
Type
Slab
Concrete
Length
32 ft
1 main span
Daily traffic
11
2021 count
Owner
County
County Highway Agency

About this bridge

Thorpe Road over Crab Creek is a concrete slab carrying Thorpe Road over Crab Creek in Lincoln County, Washington. It was built in 1900 and reconstructed in 1972, so it is 125 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 11 vehicles a day, roughly 40% of them trucks, projected to reach 40 by 2042. The structure is 32 ft (9.8 m) long and 18 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesThorpe Road
CrossesCrab Creek
Location0.02 N Fhs L220
RouteCounty Highway 61710
Coordinates47.49519, -117.99394
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38.9 US tons
Inventory rating30 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length32 ft (9.8 m)
Longest span30 ft (9.1 m)
Deck width18 ft (5.5 m)
Roadway width17 ft (5.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11 (2021)
Projected traffic40 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

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$1.5 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Thorpe Road over Crab Creek built?

It was built in 1900, making it 125 years old in 2025. It was reconstructed in 1972.

What condition is Thorpe Road over Crab 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 December 2023.

How much traffic does Thorpe Road over Crab Creek carry?

About 11 vehicles per day (2021 count), of which roughly 40% are trucks.

How long is Thorpe Road over Crab Creek?

The structure is 32 ft (9.8 m) long with a longest span of 30 ft (9.1 m) and a deck 18 ft wide.

Who owns Thorpe Road over Crab Creek?

It is owned by the County Highway Agency.