US Bridges

US101 (hwy 9) over Kilchis R. & Possetti RD

Poor

Tillamook County, Oregon · 026 MI N Tillamook · Structure no. 07424 009 06294

Built
1952
73 years old
Condition
Poor
inspected March 2023
Type
Tee Beam
Concrete Continuous
Length
276 ft
3 main spans
Daily traffic
13,357
2022 count
Owner
State
State Highway Agency

About this bridge

US101 (hwy 9) over Kilchis R. & Possetti RD is a concrete continuous tee beam carrying US101 (hwy 9) over Kilchis R. & Possetti RD in Tillamook County, Oregon. It was built in 1952, so it is 73 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.

It carries about 13,357 vehicles a day, roughly 4% of them trucks, projected to reach 13,500 by 2042. The structure is 276 ft (84.1 m) long and 35 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesUS101 (hwy 9)
CrossesKilchis R. & Possetti RD
Location026 MI N Tillamook
RouteU.S. Route 101
CountyTillamook County
StateOregon
Coordinates45.49588, -123.85039
Functional classRural Principal Arterial - Other

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating30.8 US tons
Inventory rating23.6 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3 (+6 approach)
Design loadHS 20
Structure length276 ft (84.1 m)
Longest span62 ft (18.9 m)
Deck width35 ft (10.6 m)
Roadway width30 ft (9.1 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
CrossesHighway and waterway
Detour if closed1.2 mi (2 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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$1.4 million
NavigationNo navigation control on waterway

Frequently asked questions

When was US101 (hwy 9) over Kilchis R. & Possetti RD built?

It was built in 1952, making it 73 years old in 2025.

What condition is US101 (hwy 9) over Kilchis R. & Possetti RD 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 March 2023.

How much traffic does US101 (hwy 9) over Kilchis R. & Possetti RD carry?

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

How long is US101 (hwy 9) over Kilchis R. & Possetti RD?

The structure is 276 ft (84.1 m) long with a longest span of 62 ft (18.9 m) and a deck 35 ft wide.

Who owns US101 (hwy 9) over Kilchis R. & Possetti RD?

It is owned by the State Highway Agency.