US Bridges

I-5 (hwy 001) SB over Hill Slough

Good

Lane County, Oregon · 00.2 MI N of HWY 222 JCT · Structure no. 07738A001 18304

Built
1956
69 years old
Condition
Good
inspected May 2024
Type
Tee Beam
Concrete Continuous
Length
50 ft
3 main spans
Daily traffic
21,354
2022 count
Owner
State
State Highway Agency

About this bridge

I-5 (hwy 001) SB over Hill Slough is a concrete continuous tee beam carrying I-5 (hwy 001) SB over Hill Slough in Lane County, Oregon. It was built in 1956, so it is 69 years old, older than the Oregon average of 49.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 21,354 vehicles a day, roughly 26% of them trucks, projected to reach 22,500 by 2042. The structure is 50 ft (15.2 m) long and 75 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesI-5 (hwy 001) SB
CrossesHill Slough
Location00.2 MI N of HWY 222 JCT
RouteInterstate 5
CountyLane County
StateOregon
Coordinates43.92091, -123.01206
Functional classRural Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating27.1 US tons
Inventory rating21.1 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length50 ft (15.2 m)
Longest span32 ft (9.8 m)
Deck width75 ft (22.8 m)
Roadway width73 ft (22.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic21,354 (2022)
Projected traffic22,500 by 2042
Trucks26%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate 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 I-5 (hwy 001) SB over Hill Slough built?

It was built in 1956, making it 69 years old in 2025.

What condition is I-5 (hwy 001) SB over Hill Slough in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2024.

How much traffic does I-5 (hwy 001) SB over Hill Slough carry?

About 21,354 vehicles per day (2022 count), of which roughly 26% are trucks.

How long is I-5 (hwy 001) SB over Hill Slough?

The structure is 50 ft (15.2 m) long with a longest span of 32 ft (9.8 m) and a deck 75 ft wide.

Who owns I-5 (hwy 001) SB over Hill Slough?

It is owned by the State Highway Agency.