US Bridges

US101 (hwy 9) over Potb Railroad

Fair

Tillamook County, Oregon · 020 MI N Tillamook · Structure no. 00505 009 06348

Built
1931
94 years old
Condition
Fair
inspected March 2024
Type
Tee Beam
Concrete Continuous
Length
180 ft
3 main spans
Daily traffic
13,357
2022 count
Owner
State
State Highway Agency

About this bridge

US101 (hwy 9) over Potb Railroad is a concrete continuous tee beam carrying US101 (hwy 9) over Potb Railroad in Tillamook 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 13,357 vehicles a day, roughly 4% of them trucks, projected to reach 13,500 by 2042. The structure is 180 ft (54.9 m) long and 36 ft wide. If it were closed, the detour would be 55.9 mi (90 km).

Location

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CarriesUS101 (hwy 9)
CrossesPotb Railroad
Location020 MI N Tillamook
RouteU.S. Route 101
CountyTillamook County
StateOregon
Coordinates45.48915, -123.84585
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 inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating29.3 US tons
Inventory rating22.8 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length180 ft (54.9 m)
Longest span60 ft (18.3 m)
Deck width36 ft (11.1 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,357 (2022)
Projected traffic13,500 by 2042
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad
Detour if closed55.9 mi (90 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 statusHistorical significance not determinable at this time
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$922,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was US101 (hwy 9) over Potb Railroad built?

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

What condition is US101 (hwy 9) over Potb Railroad 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 March 2024.

How much traffic does US101 (hwy 9) over Potb Railroad carry?

About 13,357 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is US101 (hwy 9) over Potb Railroad?

The structure is 180 ft (54.9 m) long with a longest span of 60 ft (18.3 m) and a deck 36 ft wide.

Who owns US101 (hwy 9) over Potb Railroad?

It is owned by the State Highway Agency.