US Bridges

Maple Drive over Marshall Slough

Good

Lane County, Oregon · 003 E Maple Dr-River RD · Structure no. 39C309314000031

Built
1984
41 years old
Condition
Good
inspected July 2024
Type
Slab
Prestressed Concrete
Length
100 ft
2 main spans
Daily traffic
307
2020 count
Owner
County
County Highway Agency

About this bridge

Maple Drive over Marshall Slough is a prestressed concrete slab carrying Maple Drive over Marshall Slough in Lane County, Oregon. It was built in 1984, so it is 41 years old, younger 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 307 vehicles a day, roughly 3% of them trucks, projected to reach 351 by 2025. The structure is 100 ft (30.5 m) long and 28 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesMaple Drive
CrossesMarshall Slough
Location003 E Maple Dr-River RD
RouteCounty Highway C3140
CountyLane County
StateOregon
Coordinates44.16891, -123.15524
Functional classRural Local

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54 US tons
Inventory rating33 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckOther
Main spans2
Design loadHS 20
Structure length100 ft (30.5 m)
Longest span50 ft (15.2 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
Trucks3%
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 Maple Drive over Marshall Slough built?

It was built in 1984, making it 41 years old in 2025.

What condition is Maple Drive over Marshall 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 July 2024.

How much traffic does Maple Drive over Marshall Slough carry?

About 307 vehicles per day (2020 count), of which roughly 3% are trucks.

How long is Maple Drive over Marshall Slough?

The structure is 100 ft (30.5 m) long with a longest span of 50 ft (15.2 m) and a deck 28 ft wide.

Who owns Maple Drive over Marshall Slough?

It is owned by the County Highway Agency.