US Bridges

SR 6 over Rock CR Np Ry-Abandoned

Fair

Lewis County, Washington · 0.4 E Pacific CO · Structure no. 0001351A0000000

Built
1930
95 years old
Condition
Fair
inspected May 2023
Type
Tee Beam
Concrete Continuous
Length
256 ft
6 main spans
Daily traffic
1,600
2023 count
Owner
State
State Highway Agency

About this bridge

SR 6 over Rock CR Np Ry-Abandoned is a concrete continuous tee beam carrying SR 6 over Rock CR Np Ry-Abandoned in Lewis County, Washington. It was built in 1930, so it is 95 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 1,600 vehicles a day, roughly 13% of them trucks, projected to reach 1,765 by 2039. The structure is 256 ft (78 m) long and 27 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesSR 6
CrossesRock CR Np Ry-Abandoned
Location0.4 E Pacific CO
RouteState Highway 6
CountyLewis County
StateWashington
Coordinates46.55222, -123.35136
Functional classRural Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
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 protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating22.2 US tons
Inventory rating17.2 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadH 15
Structure length256 ft (78 m)
Longest span54 ft (16.5 m)
Deck width27 ft (8.2 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,600 (2023)
Projected traffic1,765 by 2039
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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$3.6 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 6 over Rock CR Np Ry-Abandoned built?

It was built in 1930, making it 95 years old in 2025.

What condition is SR 6 over Rock CR Np Ry-Abandoned 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 May 2023.

How much traffic does SR 6 over Rock CR Np Ry-Abandoned carry?

About 1,600 vehicles per day (2023 count), of which roughly 13% are trucks.

How long is SR 6 over Rock CR Np Ry-Abandoned?

The structure is 256 ft (78 m) long with a longest span of 54 ft (16.5 m) and a deck 27 ft wide.

Who owns SR 6 over Rock CR Np Ry-Abandoned?

It is owned by the State Highway Agency.