US Bridges

SR 6 over Rock Creek

Fair

Pacific County, Washington · 23.2 E JCT US 101 · Structure no. 0001229A0000000

Built
1928
97 years old
Condition
Fair
inspected May 2023
Type
Tee Beam
Concrete
Length
41 ft
1 main span
Daily traffic
1,600
2023 count
Owner
State
State Highway Agency

About this bridge

SR 6 over Rock Creek is a concrete tee beam carrying SR 6 over Rock Creek in Pacific County, Washington. It was built in 1928, so it is 97 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 6 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 1,667 by 2039. The structure is 41 ft (12.5 m) long and 33 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesSR 6
CrossesRock Creek
Location23.2 E JCT US 101
RouteState Highway 6
CountyPacific County
StateWashington
Coordinates46.54658, -123.38619
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
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating33.6 US tons
Inventory rating26.1 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length41 ft (12.5 m)
Longest span38 ft (11.7 m)
Deck width33 ft (10.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,600 (2023)
Projected traffic1,667 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$623,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 6 over Rock Creek built?

It was built in 1928, making it 97 years old in 2025.

What condition is SR 6 over Rock Creek 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 Creek carry?

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

How long is SR 6 over Rock Creek?

The structure is 41 ft (12.5 m) long with a longest span of 38 ft (11.7 m) and a deck 33 ft wide.

Who owns SR 6 over Rock Creek?

It is owned by the State Highway Agency.