US Bridges

US101 (hwy 9) over Simmons Creek

Fair

Tillamook County, Oregon · 055 MI S Tillamook · Structure no. 00877 009 07185

Built
1989
36 years old
Condition
Fair
inspected March 2024
Type
Culvert
Steel
Length
21 ft
1 main span
Daily traffic
6,267
2022 count
Owner
State
State Highway Agency

About this bridge

US101 (hwy 9) over Simmons Creek is a steel culvert carrying US101 (hwy 9) over Simmons Creek in Tillamook County, Oregon. It was built in 1989, so it is 36 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 6,267 vehicles a day, roughly 16% of them trucks, projected to reach 6,400 by 2042. The structure is 21 ft (6.3 m) long. If it were closed, the detour would be 18 mi (29 km).

Location

Open in Google Maps
CarriesUS101 (hwy 9)
CrossesSimmons Creek
Location055 MI S Tillamook
RouteU.S. Route 101
CountyTillamook County
StateOregon
Coordinates45.37965, -123.8043
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.9 US tons
Inventory rating76.1 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans1
Design loadHS 25 or greater
Structure length21 ft (6.3 m)
Longest span21 ft (6.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,267 (2022)
Projected traffic6,400 by 2042
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed18 mi (29 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—
NavigationNo navigation control on waterway

Frequently asked questions

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

It was built in 1989, making it 36 years old in 2025.

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

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

About 6,267 vehicles per day (2022 count), of which roughly 16% are trucks.

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

The structure is 21 ft (6.3 m) long with a longest span of 21 ft (6.3 m).

Who owns US101 (hwy 9) over Simmons Creek?

It is owned by the State Highway Agency.