US Bridges

Stewart Parkway over South Umpqua River

Fair

Douglas County, Oregon · 0.9 MI W of I-5 · Structure no. 26T09 000 00000

Built
1978
47 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
636 ft
3 main spans
Daily traffic
12,589
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Stewart Parkway over South Umpqua River is a prestressed concrete continuous stringer/multi-beam or girder carrying Stewart Parkway over South Umpqua River in Douglas County, Oregon. It was built in 1978, so it is 47 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 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 12,589 vehicles a day, roughly 10% of them trucks, projected to reach 13,339 by 2025. The structure is 636 ft (193.9 m) long and 48 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesStewart Parkway
CrossesSouth Umpqua River
Location0.9 MI W of I-5
RouteCity Street 3135
StateOregon
Coordinates43.21609, -123.37493
Functional classUrban 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating24.7 US tons
Inventory rating19 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckNot applicable
Main spans3
Design loadHS 20
Structure length636 ft (193.9 m)
Longest span260 ft (79.2 m)
Deck width48 ft (14.6 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,589 (2020)
Projected traffic13,339 by 2025
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Stewart Parkway over South Umpqua River built?

It was built in 1978, making it 47 years old in 2025.

What condition is Stewart Parkway over South Umpqua 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 April 2023.

How much traffic does Stewart Parkway over South Umpqua River carry?

About 12,589 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Stewart Parkway over South Umpqua River?

The structure is 636 ft (193.9 m) long with a longest span of 260 ft (79.2 m) and a deck 48 ft wide.

Who owns Stewart Parkway over South Umpqua River?

It is owned by the City or Municipal Highway Agency.