US Bridges

I-5 (hwy 1) Conn. over Chehulpum

Fair

Marion County, Oregon · 079 MI N of Albany · Structure no. 08117 001C24214

Built
1957
68 years old
Condition
Fair
inspected December 2023
Type
Slab
Concrete Continuous
Length
38 ft
3 main spans
Daily traffic
962
2022 count
Owner
State
State Highway Agency

About this bridge

I-5 (hwy 1) Conn. over Chehulpum is a concrete continuous slab carrying I-5 (hwy 1) Conn. over Chehulpum in Marion County, Oregon. It was built in 1957, so it is 68 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.

It carries about 962 vehicles a day, roughly 15% of them trucks, projected to reach 1,100 by 2030. The structure is 38 ft (11.6 m) long and 33 ft wide. If it were closed, the detour would be 4.3 mi (7 km).

Location

Open in Google Maps
CarriesI-5 (hwy 1) Conn.
CrossesChehulpum
Location079 MI N of Albany
RouteState Highway 5
CountyMarion County
StateOregon
Coordinates44.75806, -123.04669
Functional classRural Major Collector

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
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 rating44 US tons
Inventory rating27 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length38 ft (11.6 m)
Longest span26 ft (7.9 m)
Deck width33 ft (10.1 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic962 (2022)
Projected traffic1,100 by 2030
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed4.3 mi (7 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 I-5 (hwy 1) Conn. over Chehulpum built?

It was built in 1957, making it 68 years old in 2025.

What condition is I-5 (hwy 1) Conn. over Chehulpum 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 2023.

How much traffic does I-5 (hwy 1) Conn. over Chehulpum carry?

About 962 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is I-5 (hwy 1) Conn. over Chehulpum?

The structure is 38 ft (11.6 m) long with a longest span of 26 ft (7.9 m) and a deck 33 ft wide.

Who owns I-5 (hwy 1) Conn. over Chehulpum?

It is owned by the State Highway Agency.