US Bridges

US101 (hwy 9) over Nestucca River

Fair

Tillamook County, Oregon · 009 MI N Hebo JCT · Structure no. 00555B009 08408

Built
1991
34 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
265 ft
2 main spans
Daily traffic
4,294
2022 count
Owner
State
State Highway Agency

About this bridge

US101 (hwy 9) over Nestucca River is a prestressed concrete stringer/multi-beam or girder carrying US101 (hwy 9) over Nestucca River in Tillamook County, Oregon. It was built in 1991, so it is 34 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 4,294 vehicles a day, roughly 16% of them trucks, projected to reach 4,800 by 2042. The structure is 265 ft (80.9 m) long and 47 ft wide. If it were closed, the detour would be 19.3 mi (31 km).

Location

Open in Google Maps
CarriesUS101 (hwy 9)
CrossesNestucca River
Location009 MI N Hebo JCT
RouteU.S. Route 101
CountyTillamook County
StateOregon
Coordinates45.24142, -123.86193
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.6 US tons
Inventory rating38.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length265 ft (80.9 m)
Longest span133 ft (40.5 m)
Deck width47 ft (14.2 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,294 (2022)
Projected traffic4,800 by 2042
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.3 mi (31 km)
TollOn a free road
National Highway SystemYes

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—
NavigationNo navigation control on waterway

Frequently asked questions

When was US101 (hwy 9) over Nestucca River built?

It was built in 1991, making it 34 years old in 2025.

What condition is US101 (hwy 9) over Nestucca River 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 Nestucca River carry?

About 4,294 vehicles per day (2022 count), of which roughly 16% are trucks.

How long is US101 (hwy 9) over Nestucca River?

The structure is 265 ft (80.9 m) long with a longest span of 133 ft (40.5 m) and a deck 47 ft wide.

Who owns US101 (hwy 9) over Nestucca River?

It is owned by the State Highway Agency.