US Bridges

Sunset Highway RD over Cottonwood Creek

Good

Lincoln County, Washington · 0.09 E SR 25 · Structure no. 086732000000000

Built
2002
23 years old
Condition
Good
inspected October 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
65 ft
1 main span
Daily traffic
365
2020 count
Owner
County
County Highway Agency

About this bridge

Sunset Highway RD over Cottonwood Creek is a prestressed concrete stringer/multi-beam or girder carrying Sunset Highway RD over Cottonwood Creek in Lincoln County, Washington. It was built in 2002, so it is 23 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 365 vehicles a day, roughly 40% of them trucks, projected to reach 465 by 2042. The structure is 65 ft (19.8 m) long and 31 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesSunset Highway RD
CrossesCottonwood Creek
Location0.09 E SR 25
RouteCounty Highway 63000
Coordinates47.65583, -118.139
Functional classRural Minor Collector

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 inspectionOctober 2024
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 rating58.5 US tons
Inventory rating44.6 US tons

Structure

MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length65 ft (19.8 m)
Longest span63 ft (19.2 m)
Deck width31 ft (9.3 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic365 (2020)
Projected traffic465 by 2042
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$2.7 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Sunset Highway RD over Cottonwood Creek built?

It was built in 2002, making it 23 years old in 2025.

What condition is Sunset Highway RD over Cottonwood 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 2024.

How much traffic does Sunset Highway RD over Cottonwood Creek carry?

About 365 vehicles per day (2020 count), of which roughly 40% are trucks.

How long is Sunset Highway RD over Cottonwood Creek?

The structure is 65 ft (19.8 m) long with a longest span of 63 ft (19.2 m) and a deck 31 ft wide.

Who owns Sunset Highway RD over Cottonwood Creek?

It is owned by the County Highway Agency.