US Bridges

Speasl Rd. over Mcdowell CR

FairPosted for load

Linn County, Oregon · 001 MI S CR 904 Inter · Structure no. 11954 092700002

Built
1948
77 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
41 ft
1 main span
Daily traffic
170
2021 count
Owner
County
County Highway Agency

About this bridge

Speasl Rd. over Mcdowell CR is a steel stringer/multi-beam or girder carrying Speasl Rd. over Mcdowell CR in Linn County, Oregon. It was built in 1948, so it is 77 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. Its operating status is: posted for load restriction.

It carries about 170 vehicles a day, roughly 10% of them trucks, projected to reach 237 by 2041. The structure is 41 ft (12.5 m) long and 18 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

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CarriesSpeasl Rd.
CrossesMcdowell CR
Location001 MI S CR 904 Inter
RouteCounty Highway C0927
CountyLinn County
StateOregon
Coordinates44.45801, -122.70765
Functional classRural Local

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating26.1 US tons
Inventory rating20 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans1
Design loadH 20
Structure length41 ft (12.5 m)
Longest span39 ft (11.9 m)
Deck width18 ft (5.6 m)
Roadway width17 ft (5.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic170 (2021)
Projected traffic237 by 2041
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed2.5 mi (4 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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$210,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Speasl Rd. over Mcdowell CR built?

It was built in 1948, making it 77 years old in 2025.

What condition is Speasl Rd. over Mcdowell CR 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 Speasl Rd. over Mcdowell CR carry?

About 170 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is Speasl Rd. over Mcdowell CR?

The structure is 41 ft (12.5 m) long with a longest span of 39 ft (11.9 m) and a deck 18 ft wide.

Who owns Speasl Rd. over Mcdowell CR?

It is owned by the County Highway Agency.