US Bridges

US101 (hwy 9) over Yaquina Bay

FairPosted for load

Lincoln County, Oregon · Newport S C Limits · Structure no. 01820B009 14182

Built
1934
91 years old, rebuilt 1997
Condition
Fair
inspected April 2024
Type
Arch - Deck
Concrete Continuous
Length
1,653 ft
5 main spans
Daily traffic
17,629
2022 count
Owner
State
State Highway Agency

About this bridge

US101 (hwy 9) over Yaquina Bay is a concrete continuous arch - deck carrying US101 (hwy 9) over Yaquina Bay in Lincoln County, Oregon. It was built in 1934 and reconstructed in 1997, so it is 91 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. Its operating status is: posted for other load-capacity restriction.

It carries about 17,629 vehicles a day, roughly 2% of them trucks, projected to reach 24,800 by 2042. The structure is 1,653 ft (503.7 m) long and 36 ft wide. If it were closed, the detour would be 81.4 mi (131 km).

Location

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CarriesUS101 (hwy 9)
CrossesYaquina Bay
LocationNewport S C Limits
RouteU.S. Route 101
CountyLincoln County
StateOregon
Coordinates44.62141, -124.05548
Functional classUrban Other Principal 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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusPosted for other load-capacity restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating25.4 US tons
Inventory rating19.6 US tons

Structure

Structure typeArch - Deck
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5 (+10 approach)
Design loadH 15
Structure length1,653 ft (503.7 m)
Longest span269 ft (81.9 m)
Deck width36 ft (11.1 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic17,629 (2022)
Projected traffic24,800 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway and waterway
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 statusListed on the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$21.7 million
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was US101 (hwy 9) over Yaquina Bay built?

It was built in 1934, making it 91 years old in 2025. It was reconstructed in 1997.

What condition is US101 (hwy 9) over Yaquina Bay 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 April 2024.

How much traffic does US101 (hwy 9) over Yaquina Bay carry?

About 17,629 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is US101 (hwy 9) over Yaquina Bay?

The structure is 1,653 ft (503.7 m) long with a longest span of 269 ft (81.9 m) and a deck 36 ft wide.

Who owns US101 (hwy 9) over Yaquina Bay?

It is owned by the State Highway Agency.