US Bridges

I-5 (hwy 001) SB over Cow Creek

Fair

Douglas County, Oregon · I-5 NB MP 86.52 · Structure no. 19107 001 08652

Built
2005
20 years old
Condition
Fair
inspected December 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
221 ft
3 main spans
Daily traffic
10,270
2022 count
Owner
State
State Highway Agency

About this bridge

I-5 (hwy 001) SB over Cow Creek is a prestressed concrete continuous stringer/multi-beam or girder carrying I-5 (hwy 001) SB over Cow Creek in Douglas County, Oregon. It was built in 2005, so it is 20 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 10,270 vehicles a day, roughly 13% of them trucks, projected to reach 11,600 by 2042. The structure is 221 ft (67.5 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-5 (hwy 001) SB
CrossesCow Creek
LocationI-5 NB MP 86.52
RouteInterstate 5
CountyDouglas County
StateOregon
Coordinates42.78099, -123.27293
Functional classRural Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50.7 US tons
Inventory rating39.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length221 ft (67.5 m)
Longest span103 ft (31.4 m)
Deck width44 ft (13.4 m)
Roadway width41 ft (12.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,270 (2022)
Projected traffic11,600 by 2042
Trucks13%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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—
NavigationNo navigation control on waterway

Frequently asked questions

When was I-5 (hwy 001) SB over Cow Creek built?

It was built in 2005, making it 20 years old in 2025.

What condition is I-5 (hwy 001) SB over Cow Creek 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 December 2024.

How much traffic does I-5 (hwy 001) SB over Cow Creek carry?

About 10,270 vehicles per day (2022 count), of which roughly 13% are trucks.

How long is I-5 (hwy 001) SB over Cow Creek?

The structure is 221 ft (67.5 m) long with a longest span of 103 ft (31.4 m) and a deck 44 ft wide.

Who owns I-5 (hwy 001) SB over Cow Creek?

It is owned by the State Highway Agency.