US Bridges

SR 14 over Cape Horn Slide

Fair

Skamania County, Washington · 3.3 E Clark CO · Structure no. 0001151A0000000

Built
1930
95 years old, rebuilt 1954
Condition
Fair
inspected July 2023
Type
Tee Beam
Concrete
Length
480 ft
14 main spans
Daily traffic
4,879
2023 count
Owner
State
State Highway Agency

About this bridge

SR 14 over Cape Horn Slide is a concrete tee beam carrying SR 14 over Cape Horn Slide in Skamania County, Washington. It was built in 1930 and reconstructed in 1954, 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 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 4,879 vehicles a day, roughly 9% of them trucks, projected to reach 6,560 by 2039. The structure is 480 ft (146.3 m) long and 27 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesSR 14
CrossesCape Horn Slide
Location3.3 E Clark CO
RouteState Highway 14
CountySkamania County
StateWashington
Coordinates45.57658, -122.19494
Functional classRural Principal Arterial - Other

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating42.9 US tons
Inventory rating33.2 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans14
Design loadH 15
Structure length480 ft (146.3 m)
Longest span32 ft (9.8 m)
Deck width27 ft (8.2 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,879 (2023)
Projected traffic6,560 by 2039
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesOther
Detour if closed8.7 mi (14 km)
TollOn a free road
National Highway SystemYes

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$6.6 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR 14 over Cape Horn Slide built?

It was built in 1930, making it 95 years old in 2025. It was reconstructed in 1954.

What condition is SR 14 over Cape Horn Slide 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 July 2023.

How much traffic does SR 14 over Cape Horn Slide carry?

About 4,879 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is SR 14 over Cape Horn Slide?

The structure is 480 ft (146.3 m) long with a longest span of 32 ft (9.8 m) and a deck 27 ft wide.

Who owns SR 14 over Cape Horn Slide?

It is owned by the State Highway Agency.