US Bridges

HWY 164 over Chehulpum Creek

FairPosted for load

Marion County, Oregon · 026 MI S HWY 1 JCT · Structure no. 00366 164 00264

Built
1919
106 years old
Condition
Fair
inspected July 2023
Type
Slab
Concrete
Length
20 ft
1 main span
Daily traffic
3,115
2022 count
Owner
State
State Highway Agency

About this bridge

HWY 164 over Chehulpum Creek is a concrete slab carrying HWY 164 over Chehulpum Creek in Marion County, Oregon. It was built in 1919, so it is 106 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 6 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 3,115 vehicles a day, roughly 9% of them trucks, projected to reach 3,400 by 2042. The structure is 20 ft (6.1 m) long and 28 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesHWY 164
CrossesChehulpum Creek
Location026 MI S HWY 1 JCT
RouteState Highway 164
CountyMarion County
StateOregon
Coordinates44.76204, -123.02564
Functional classRural Minor Arterial

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusPosted for other load-capacity restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating28.5 US tons
Inventory rating22.2 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length20 ft (6.1 m)
Longest span20 ft (6.1 m)
Deck width28 ft (8.5 m)
Roadway width25 ft (7.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,115 (2022)
Projected traffic3,400 by 2042
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$102,000
NavigationNo navigation control on waterway

Frequently asked questions

When was HWY 164 over Chehulpum Creek built?

It was built in 1919, making it 106 years old in 2025.

What condition is HWY 164 over Chehulpum 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 July 2023.

How much traffic does HWY 164 over Chehulpum Creek carry?

About 3,115 vehicles per day (2022 count), of which roughly 9% are trucks.

How long is HWY 164 over Chehulpum Creek?

The structure is 20 ft (6.1 m) long with a longest span of 20 ft (6.1 m) and a deck 28 ft wide.

Who owns HWY 164 over Chehulpum Creek?

It is owned by the State Highway Agency.