US Bridges

SR 231 over Crab Creek

Good

Lincoln County, Washington · 15.9 N JCT SR 23 · Structure no. 0012593A0000000

Built
1984
41 years old
Condition
Good
inspected October 2023
Type
Slab
Concrete
Length
44 ft
1 main span
Daily traffic
288
2023 count
Owner
State
State Highway Agency

About this bridge

SR 231 over Crab Creek is a concrete slab carrying SR 231 over Crab Creek in Lincoln County, Washington. It was built in 1984, so it is 41 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 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 288 vehicles a day, roughly 20% of them trucks, projected to reach 257 by 2039. The structure is 44 ft (13.4 m) long and 40 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesSR 231
CrossesCrab Creek
Location15.9 N JCT SR 23
RouteState Highway 231
CountyLincoln County
StateWashington
Coordinates47.50467, -117.95106
Functional classRural Major Collector

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 inspectionOctober 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating73 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length44 ft (13.4 m)
Longest span40 ft (12.2 m)
Deck width40 ft (12.2 m)
Roadway width37 ft (11.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic288 (2023)
Projected traffic257 by 2039
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$669,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 231 over Crab Creek built?

It was built in 1984, making it 41 years old in 2025.

What condition is SR 231 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 October 2023.

How much traffic does SR 231 over Crab Creek carry?

About 288 vehicles per day (2023 count), of which roughly 20% are trucks.

How long is SR 231 over Crab Creek?

The structure is 44 ft (13.4 m) long with a longest span of 40 ft (12.2 m) and a deck 40 ft wide.

Who owns SR 231 over Crab Creek?

It is owned by the State Highway Agency.