US Bridges

SR 508 over Cinebar Creek

Good

Lewis County, Washington · 19.5 E JCT I-5 · Structure no. 0003054A0000000

Built
1946
79 years old
Condition
Good
inspected August 2023
Type
Tee Beam
Concrete
Length
37 ft
1 main span
Daily traffic
1,200
2023 count
Owner
State
State Highway Agency

About this bridge

SR 508 over Cinebar Creek is a concrete tee beam carrying SR 508 over Cinebar Creek in Lewis County, Washington. It was built in 1946, so it is 79 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 1,200 vehicles a day, roughly 11% of them trucks, projected to reach 1,517 by 2039. The structure is 37 ft (11.3 m) long and 30 ft wide. If it were closed, the detour would be 34.8 mi (56 km).

Location

Open in Google Maps
CarriesSR 508
CrossesCinebar Creek
Location19.5 E JCT I-5
RouteState Highway 508
CountyLewis County
StateWashington
Coordinates46.60469, -122.51006
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating25 US tons
Inventory rating19.3 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length37 ft (11.3 m)
Longest span32 ft (9.8 m)
Deck width30 ft (9.1 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,200 (2023)
Projected traffic1,517 by 2039
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed34.8 mi (56 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$457,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 508 over Cinebar Creek built?

It was built in 1946, making it 79 years old in 2025.

What condition is SR 508 over Cinebar 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 August 2023.

How much traffic does SR 508 over Cinebar Creek carry?

About 1,200 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is SR 508 over Cinebar Creek?

The structure is 37 ft (11.3 m) long with a longest span of 32 ft (9.8 m) and a deck 30 ft wide.

Who owns SR 508 over Cinebar Creek?

It is owned by the State Highway Agency.