US Bridges

Or 99E (hwy 58) over Willamette River

FairPosted for load

Linn County, Oregon · Scl Harrisburg · Structure no. 00583E058 02909

Built
1925
100 years old, rebuilt 1976
Condition
Fair
inspected November 2023
Type
Truss - Thru
Steel
Length
2,146 ft
3 main spans
Daily traffic
10,393
2022 count
Owner
State
State Highway Agency

About this bridge

Or 99E (hwy 58) over Willamette River is a steel truss - thru carrying Or 99E (hwy 58) over Willamette River in Linn County, Oregon. It was built in 1925 and reconstructed in 1976, so it is 100 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. Its operating status is: posted for load restriction.

It carries about 10,393 vehicles a day, roughly 19% of them trucks, projected to reach 10,600 by 2042. The structure is 2,146 ft (654 m) long and 24 ft wide. If it were closed, the detour would be 37.9 mi (61 km).

CarriesOr 99E (hwy 58)
CrossesWillamette River
LocationScl Harrisburg
RouteState Highway 99
StateOregon
Coordinates44.2671, -123.17522
Functional classRural 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
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 inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating24.7 US tons
Inventory rating19 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans3 (+33 approach)
Design loadH 20
Structure length2,146 ft (654 m)
Longest span180 ft (54.9 m)
Deck width24 ft (7.2 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deck16 ft (5 m)

Traffic and service

Average daily traffic10,393 (2022)
Projected traffic10,600 by 2042
Trucks19%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed37.9 mi (61 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$11.3 million
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was Or 99E (hwy 58) over Willamette River built?

It was built in 1925, making it 100 years old in 2025. It was reconstructed in 1976.

What condition is Or 99E (hwy 58) over Willamette River 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 November 2023.

How much traffic does Or 99E (hwy 58) over Willamette River carry?

About 10,393 vehicles per day (2022 count), of which roughly 19% are trucks.

How long is Or 99E (hwy 58) over Willamette River?

The structure is 2,146 ft (654 m) long with a longest span of 180 ft (54.9 m) and a deck 24 ft wide.

Who owns Or 99E (hwy 58) over Willamette River?

It is owned by the State Highway Agency.