US Bridges

Hayes Lane over Marshall Slough

Fair

Lane County, Oregon · 040 MI SE Junction City · Structure no. 39C305312000084

Built
1978
47 years old
Condition
Fair
inspected July 2024
Type
Slab
Prestressed Concrete
Length
123 ft
4 main spans
Daily traffic
307
2020 count
Owner
County
County Highway Agency

About this bridge

Hayes Lane over Marshall Slough is a prestressed concrete slab carrying Hayes Lane over Marshall Slough in Lane County, Oregon. It was built in 1978, so it is 47 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 307 vehicles a day, roughly 10% of them trucks, projected to reach 351 by 2025. The structure is 123 ft (37.5 m) long and 28 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesHayes Lane
CrossesMarshall Slough
Location040 MI SE Junction City
RouteCounty Highway C3120
CountyLane County
StateOregon
Coordinates44.19023, -123.15533
Functional classRural Local

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating42 US tons
Inventory rating25 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckOther
Main spans4
Design loadHS 20
Structure length123 ft (37.5 m)
Longest span31 ft (9.4 m)
Deck width28 ft (8.5 m)
Roadway width28 ft (8.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic307 (2020)
Projected traffic351 by 2025
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Hayes Lane over Marshall Slough built?

It was built in 1978, making it 47 years old in 2025.

What condition is Hayes Lane over Marshall Slough 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 2024.

How much traffic does Hayes Lane over Marshall Slough carry?

About 307 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Hayes Lane over Marshall Slough?

The structure is 123 ft (37.5 m) long with a longest span of 31 ft (9.4 m) and a deck 28 ft wide.

Who owns Hayes Lane over Marshall Slough?

It is owned by the County Highway Agency.