US Bridges

US101 (hwy 9) over Cape Perpetua

Fair

Lincoln County, Oregon · 012 MI N Lane CO LN · Structure no. 01175 009 16646

Built
1931
94 years old
Condition
Fair
inspected July 2023
Type
Tee Beam
Concrete Continuous
Length
76 ft
2 main spans
Daily traffic
2,862
2022 count
Owner
State
State Highway Agency

About this bridge

US101 (hwy 9) over Cape Perpetua is a concrete continuous tee beam carrying US101 (hwy 9) over Cape Perpetua in Lincoln County, Oregon. It was built in 1931, so it is 94 years old, older than the Oregon average of 49.9 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 2,862 vehicles a day, roughly 8% of them trucks, projected to reach 3,600 by 2042. The structure is 76 ft (23.2 m) long and 27 ft wide. If it were closed, the detour would be 81.4 mi (131 km).

Location

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CarriesUS101 (hwy 9)
CrossesCape Perpetua
Location012 MI N Lane CO LN
RouteU.S. Route 101
CountyLincoln County
StateOregon
Coordinates44.2887, -124.1127
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.
Substructure7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61 US tons
Inventory rating36 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length76 ft (23.2 m)
Longest span38 ft (11.6 m)
Deck width27 ft (8.2 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,862 (2022)
Projected traffic3,600 by 2042
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesOther
Detour if closed81.4 mi (131 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkNon-Interstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$389,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was US101 (hwy 9) over Cape Perpetua built?

It was built in 1931, making it 94 years old in 2025.

What condition is US101 (hwy 9) over Cape Perpetua 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 US101 (hwy 9) over Cape Perpetua carry?

About 2,862 vehicles per day (2022 count), of which roughly 8% are trucks.

How long is US101 (hwy 9) over Cape Perpetua?

The structure is 76 ft (23.2 m) long with a longest span of 38 ft (11.6 m) and a deck 27 ft wide.

Who owns US101 (hwy 9) over Cape Perpetua?

It is owned by the State Highway Agency.