US Bridges

Mcdowell CR Drive over South Santiam River

Fair

Linn County, Oregon · 4.0 MI No Sweethome · Structure no. 01509A072900004

Built
1959
66 years old, rebuilt 1970
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
359 ft
1 main span
Daily traffic
618
2021 count
Owner
County
County Highway Agency

About this bridge

Mcdowell CR Drive over South Santiam River is a steel stringer/multi-beam or girder carrying Mcdowell CR Drive over South Santiam River in Linn County, Oregon. It was built in 1959 and reconstructed in 1970, so it is 66 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.

It carries about 618 vehicles a day, roughly 10% of them trucks, projected to reach 849 by 2041. The structure is 359 ft (109.4 m) long and 27 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

Location

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CarriesMcdowell CR Drive
CrossesSouth Santiam River
Location4.0 MI No Sweethome
RouteCounty Highway 0
CountyLinn County
StateOregon
Coordinates44.46104, -122.76904
Functional classRural Major Collector

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 protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating36.4 US tons
Inventory rating28.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+3 approach)
Design loadHS 20
Structure length359 ft (109.4 m)
Longest span155 ft (47.2 m)
Deck width27 ft (8.2 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic618 (2021)
Projected traffic849 by 2041
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Mcdowell CR Drive over South Santiam River built?

It was built in 1959, making it 66 years old in 2025. It was reconstructed in 1970.

What condition is Mcdowell CR Drive over South Santiam 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 August 2023.

How much traffic does Mcdowell CR Drive over South Santiam River carry?

About 618 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is Mcdowell CR Drive over South Santiam River?

The structure is 359 ft (109.4 m) long with a longest span of 155 ft (47.2 m) and a deck 27 ft wide.

Who owns Mcdowell CR Drive over South Santiam River?

It is owned by the County Highway Agency.