US Bridges

Or 99 over I-5 (hwy 001)

Fair

Douglas County, Oregon · 01.0 MI S Oakland Wc Lmts · Structure no. 07508A234 00010

Built
1976
49 years old
Condition
Fair
inspected February 2023
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
342 ft
4 main spans
Daily traffic
445
2022 count
Owner
State
State Highway Agency

About this bridge

Or 99 over I-5 (hwy 001) is a concrete continuous box beam or girders - multiple carrying Or 99 over I-5 (hwy 001) in Douglas County, Oregon. It was built in 1976, so it is 49 years old, younger 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 445 vehicles a day, roughly 25% of them trucks, projected to reach 560 by 2030. The structure is 342 ft (104.2 m) long and 30 ft wide. If it were closed, the detour would be 18.6 mi (30 km).

Location

Open in Google Maps
CarriesOr 99
CrossesI-5 (hwy 001)
Location01.0 MI S Oakland Wc Lmts
RouteState Highway 99
CountyDouglas County
StateOregon
Coordinates43.4364, -123.31372
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.
Substructure7 GoodSome minor problems.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating35.7 US tons
Inventory rating27.4 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length342 ft (104.2 m)
Longest span71 ft (21.6 m)
Deck width30 ft (9 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic445 (2022)
Projected traffic560 by 2030
Trucks25%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed18.6 mi (30 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$946,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was Or 99 over I-5 (hwy 001) built?

It was built in 1976, making it 49 years old in 2025.

What condition is Or 99 over I-5 (hwy 001) 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 February 2023.

How much traffic does Or 99 over I-5 (hwy 001) carry?

About 445 vehicles per day (2022 count), of which roughly 25% are trucks.

How long is Or 99 over I-5 (hwy 001)?

The structure is 342 ft (104.2 m) long with a longest span of 71 ft (21.6 m) and a deck 30 ft wide.

Who owns Or 99 over I-5 (hwy 001)?

It is owned by the State Highway Agency.