US Bridges

Canby Bridge 37430 over Crab Creek

Good

Lincoln County, Washington · 4.09 W SR 23 · Structure no. 083259000000000

Built
1913
112 years old, rebuilt 1990
Condition
Good
inspected December 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
61 ft
1 main span
Daily traffic
11
2020 count
Owner
County
County Highway Agency

About this bridge

Canby Bridge 37430 over Crab Creek is a prestressed concrete stringer/multi-beam or girder carrying Canby Bridge 37430 over Crab Creek in Lincoln County, Washington. It was built in 1913 and reconstructed in 1990, so it is 112 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 15 by 2040. The structure is 61 ft (18.6 m) long and 26 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesCanby Bridge 37430
CrossesCrab Creek
Location4.09 W SR 23
RouteCounty Highway 37430
Coordinates47.465, -118.18167
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.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionDecember 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating62.2 US tons
Inventory rating33.6 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20 + Mod
Structure length61 ft (18.6 m)
Longest span61 ft (18.6 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11 (2020)
Projected traffic15 by 2040
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Canby Bridge 37430 over Crab Creek built?

It was built in 1913, making it 112 years old in 2025. It was reconstructed in 1990.

What condition is Canby Bridge 37430 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 2022.

How much traffic does Canby Bridge 37430 over Crab Creek carry?

About 11 vehicles per day (2020 count), of which roughly 40% are trucks.

How long is Canby Bridge 37430 over Crab Creek?

The structure is 61 ft (18.6 m) long with a longest span of 61 ft (18.6 m) and a deck 26 ft wide.

Who owns Canby Bridge 37430 over Crab Creek?

It is owned by the County Highway Agency.