US Bridges

Or 99W (hwy 91) over Wprr

Fair

Benton County, Oregon · 007 MI S Corvallis · Structure no. 07321 01W 08261

Built
1954
71 years old
Condition
Fair
inspected April 2023
Type
Tee Beam
Concrete Continuous
Length
251 ft
4 main spans
Daily traffic
10,469
2022 count
Owner
State
State Highway Agency

About this bridge

Or 99W (hwy 91) over Wprr is a concrete continuous tee beam carrying Or 99W (hwy 91) over Wprr in Benton County, Oregon. It was built in 1954, so it is 71 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 10,469 vehicles a day, roughly 2% of them trucks, projected to reach 11,900 by 2042. The structure is 251 ft (76.4 m) long and 67 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesOr 99W (hwy 91)
CrossesWprr
Location007 MI S Corvallis
RouteState Highway 99
CountyBenton County
StateOregon
Coordinates44.57749, -123.25791
Functional classUrban Other Principal 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.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating25 US tons
Inventory rating19.3 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length251 ft (76.4 m)
Longest span81 ft (24.8 m)
Deck width67 ft (20.5 m)
Roadway width58 ft (17.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,469 (2022)
Projected traffic11,900 by 2042
Trucks2%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and railroad
Detour if closed3.7 mi (6 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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Or 99W (hwy 91) over Wprr built?

It was built in 1954, making it 71 years old in 2025.

What condition is Or 99W (hwy 91) over Wprr 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 April 2023.

How much traffic does Or 99W (hwy 91) over Wprr carry?

About 10,469 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is Or 99W (hwy 91) over Wprr?

The structure is 251 ft (76.4 m) long with a longest span of 81 ft (24.8 m) and a deck 67 ft wide.

Who owns Or 99W (hwy 91) over Wprr?

It is owned by the State Highway Agency.