US Bridges

US101 (hwy 9) over Yaquina Bay

PoorPosted for load

Lincoln County, Oregon · Newport S C Limits · Structure no. 01820 009 14168

Built
1934
91 years old, rebuilt 1997
Condition
Poor
inspected April 2024
Type
Arch - Thru
Steel
Length
1,324 ft
1 main span
Daily traffic
20,207
2022 count
Owner
State
State Highway Agency

About this bridge

US101 (hwy 9) over Yaquina Bay is a steel arch - thru 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for other load-capacity restriction.

It carries about 20,207 vehicles a day, roughly 2% of them trucks, projected to reach 28,700 by 2042. The structure is 1,324 ft (403.6 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

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 12 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 rating24.7 US tons
Inventory rating19 US tons

Structure

Structure typeArch - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadH 15
Structure length1,324 ft (403.6 m)
Longest span608 ft (185.3 m)
Deck width36 ft (11.1 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deck15 ft (4.6 m)

Traffic and service

Average daily traffic20,207 (2022)
Projected traffic28,700 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
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 poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in April 2024.

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

About 20,207 vehicles per day (2022 count), of which roughly 2% are trucks.

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

The structure is 1,324 ft (403.6 m) long with a longest span of 608 ft (185.3 m) and a deck 36 ft wide.

Who owns US101 (hwy 9) over Yaquina Bay?

It is owned by the State Highway Agency.