US Bridges

London RD over Coast Fork Willamette R

Fair

Lane County, Oregon · 029MI S Cottage Grove Dam · Structure no. 14867A270000672

Built
1960
65 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
171 ft
3 main spans
Daily traffic
5,141
2020 count
Owner
County
County Highway Agency

About this bridge

London RD over Coast Fork Willamette R is a prestressed concrete stringer/multi-beam or girder carrying London RD over Coast Fork Willamette R in Lane County, Oregon. It was built in 1960, so it is 65 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 5,141 vehicles a day, roughly 10% of them trucks, projected to reach 6,486 by 2025. The structure is 171 ft (52.1 m) long and 31 ft wide.

CarriesLondon RD
CrossesCoast Fork Willamette R
Location029MI S Cottage Grove Dam
RouteCounty Highway A0469
StateOregon
Coordinates43.67671, -123.07348
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating36.4 US tons
Inventory rating28.2 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length171 ft (52.1 m)
Longest span58 ft (17.7 m)
Deck width31 ft (9.4 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,141 (2020)
Projected traffic6,486 by 2025
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$876,000
NavigationNo navigation control on waterway

Frequently asked questions

When was London RD over Coast Fork Willamette R built?

It was built in 1960, making it 65 years old in 2025.

What condition is London RD 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 London RD over Coast Fork Willamette R carry?

About 5,141 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is London RD over Coast Fork Willamette R?

The structure is 171 ft (52.1 m) long with a longest span of 58 ft (17.7 m) and a deck 31 ft wide.

Who owns London RD over Coast Fork Willamette R?

It is owned by the County Highway Agency.