US Bridges

Main ST over Coast Fk Willamette Riv

Fair

Lane County, Oregon · 00.27 MI W HWY 99 · Structure no. 07747 8T2 00027

Built
1953
72 years old
Condition
Fair
inspected September 2024
Type
Tee Beam
Concrete Continuous
Length
141 ft
3 main spans
Daily traffic
12,757
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Main ST over Coast Fk Willamette Riv is a concrete continuous tee beam carrying Main ST over Coast Fk Willamette Riv in Lane County, Oregon. It was built in 1953, so it is 72 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 5 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 12,757 vehicles a day, roughly 10% of them trucks, projected to reach 20,052 by 2025. The structure is 141 ft (43 m) long and 52 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesMain ST
CrossesCoast Fk Willamette Riv
Location00.27 MI W HWY 99
RouteCity Street U6500
CountyLane County
StateOregon
Coordinates43.79735, -123.06466
Functional classUrban 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no 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 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 rating37.8 US tons
Inventory rating29.3 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length141 ft (43 m)
Longest span60 ft (18.3 m)
Deck width52 ft (15.8 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,757 (2020)
Projected traffic20,052 by 2025
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Main ST over Coast Fk Willamette Riv built?

It was built in 1953, making it 72 years old in 2025.

What condition is Main ST over Coast Fk Willamette Riv 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 September 2024.

How much traffic does Main ST over Coast Fk Willamette Riv carry?

About 12,757 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Main ST over Coast Fk Willamette Riv?

The structure is 141 ft (43 m) long with a longest span of 60 ft (18.3 m) and a deck 52 ft wide.

Who owns Main ST over Coast Fk Willamette Riv?

It is owned by the City or Municipal Highway Agency.