US Bridges

US101 (hwy 9) over Potb RR

Fair

Tillamook County, Oregon · 001 MI S HWY 101/53 JCT · Structure no. 01051A009 04663

Built
1984
41 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
321 ft
4 main spans
Daily traffic
5,630
2022 count
Owner
State
State Highway Agency

About this bridge

US101 (hwy 9) over Potb RR is a prestressed concrete stringer/multi-beam or girder carrying US101 (hwy 9) over Potb RR in Tillamook County, Oregon. It was built in 1984, so it is 41 years old, younger 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 5,630 vehicles a day, roughly 13% of them trucks, projected to reach 5,800 by 2042. The structure is 321 ft (97.8 m) long and 44 ft wide. If it were closed, the detour would be 55.9 mi (90 km).

Location

Open in Google Maps
CarriesUS101 (hwy 9)
CrossesPotb RR
Location001 MI S HWY 101/53 JCT
RouteU.S. Route 101
CountyTillamook County
StateOregon
Coordinates45.70006, -123.87792
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40.7 US tons
Inventory rating31.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 25 or greater
Structure length321 ft (97.8 m)
Longest span86 ft (26.2 m)
Deck width44 ft (13.3 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,630 (2022)
Projected traffic5,800 by 2042
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
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 statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

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

It was built in 1984, making it 41 years old in 2025.

What condition is US101 (hwy 9) over Potb RR 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 2023.

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

About 5,630 vehicles per day (2022 count), of which roughly 13% are trucks.

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

The structure is 321 ft (97.8 m) long with a longest span of 86 ft (26.2 m) and a deck 44 ft wide.

Who owns US101 (hwy 9) over Potb RR?

It is owned by the State Highway Agency.