US Bridges

South 6th St. over Coast Fork Willamette R

Fair

Lane County, Oregon · 034 MI N Cottage Grove Rs · Structure no. 01432A221800208

Built
1964
61 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
185 ft
3 main spans
Daily traffic
5,065
2020 count
Owner
County
County Highway Agency

About this bridge

South 6th St. over Coast Fork Willamette R is a prestressed concrete stringer/multi-beam or girder carrying South 6th St. over Coast Fork Willamette R in Lane County, Oregon. It was built in 1964, so it is 61 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 5,065 vehicles a day, roughly 20% of them trucks, projected to reach 5,225 by 2025. The structure is 185 ft (56.4 m) long and 39 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesSouth 6th St.
CrossesCoast Fork Willamette R
Location034 MI N Cottage Grove Rs
RouteCounty Highway A0469
CountyLane County
StateOregon
Coordinates43.76338, -123.06614
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating34.3 US tons
Inventory rating26.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length185 ft (56.4 m)
Longest span69 ft (21 m)
Deck width39 ft (11.9 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,065 (2020)
Projected traffic5,225 by 2025
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed8.7 mi (14 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 South 6th St. over Coast Fork Willamette R built?

It was built in 1964, making it 61 years old in 2025.

What condition is South 6th St. over Coast Fork Willamette R 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 South 6th St. over Coast Fork Willamette R carry?

About 5,065 vehicles per day (2020 count), of which roughly 20% are trucks.

How long is South 6th St. over Coast Fork Willamette R?

The structure is 185 ft (56.4 m) long with a longest span of 69 ft (21 m) and a deck 39 ft wide.

Who owns South 6th St. over Coast Fork Willamette R?

It is owned by the County Highway Agency.