US Bridges

Mcdowell CR Drive over Mcdowell Creek

FairPosted for load

Linn County, Oregon · 033 MI East HWY 20 · Structure no. 11951A072900331

Built
1955
70 years old
Condition
Fair
inspected June 2023
Type
Tee Beam
Concrete Continuous
Length
89 ft
3 main spans
Daily traffic
515
2021 count
Owner
County
County Highway Agency

About this bridge

Mcdowell CR Drive over Mcdowell Creek is a concrete continuous tee beam carrying Mcdowell CR Drive over Mcdowell Creek in Linn County, Oregon. It was built in 1955, so it is 70 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. Its operating status is: posted for load restriction.

It carries about 515 vehicles a day, roughly 10% of them trucks, projected to reach 721 by 2041. The structure is 89 ft (27.1 m) long and 29 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

CarriesMcdowell CR Drive
CrossesMcdowell Creek
Location033 MI East HWY 20
RouteCounty Highway A0483
StateOregon
Coordinates44.4624, -122.76106
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
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 alignment8: Equal to present desirable criteria
Operating rating18.2 US tons
Inventory rating13.9 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length89 ft (27.1 m)
Longest span56 ft (17.1 m)
Deck width29 ft (8.8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic515 (2021)
Projected traffic721 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 Mcdowell Creek built?

It was built in 1955, making it 70 years old in 2025.

What condition is Mcdowell CR Drive over Mcdowell 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 June 2023.

How much traffic does Mcdowell CR Drive over Mcdowell Creek carry?

About 515 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is Mcdowell CR Drive over Mcdowell Creek?

The structure is 89 ft (27.1 m) long with a longest span of 56 ft (17.1 m) and a deck 29 ft wide.

Who owns Mcdowell CR Drive over Mcdowell Creek?

It is owned by the County Highway Agency.