US Bridges

US101 (hwy 9) over Necarney Creek

FairPosted for load

Tillamook County, Oregon · 004 MI S Short Sands Bch · Structure no. 02311 009 03953

Built
1937
88 years old
Condition
Fair
inspected December 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
602 ft
13 main spans
Daily traffic
5,300
2022 count
Owner
State
State Highway Agency

About this bridge

US101 (hwy 9) over Necarney Creek is a steel continuous stringer/multi-beam or girder carrying US101 (hwy 9) over Necarney Creek in Tillamook County, Oregon. It was built in 1937, so it is 88 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 5 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 5,300 vehicles a day, roughly 12% of them trucks, projected to reach 9,010 by 2042. The structure is 602 ft (183.5 m) long and 35 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesUS101 (hwy 9)
CrossesNecarney Creek
Location004 MI S Short Sands Bch
RouteU.S. Route 101
StateOregon
Coordinates45.757, -123.9585
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusPosted for other load-capacity restriction
ScourScour critical; foundations unstable for calculated scour conditions
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 alignment6: Equal to present minimum criteria
Operating rating23.6 US tons
Inventory rating18.2 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans13
Design loadH 15
Structure length602 ft (183.5 m)
Longest span70 ft (21.3 m)
Deck width35 ft (10.8 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,300 (2022)
Projected traffic9,010 by 2042
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed6.2 mi (10 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 statusEligible for the National Register of Historic Places
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$3.1 million
NavigationNo navigation control on waterway

Frequently asked questions

When was US101 (hwy 9) over Necarney Creek built?

It was built in 1937, making it 88 years old in 2025.

What condition is US101 (hwy 9) over Necarney Creek 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 December 2024.

How much traffic does US101 (hwy 9) over Necarney Creek carry?

About 5,300 vehicles per day (2022 count), of which roughly 12% are trucks.

How long is US101 (hwy 9) over Necarney Creek?

The structure is 602 ft (183.5 m) long with a longest span of 70 ft (21.3 m) and a deck 35 ft wide.

Who owns US101 (hwy 9) over Necarney Creek?

It is owned by the State Highway Agency.