US Bridges

Dogwood Lane over Irrigation Canal

FairPosted for load

Jefferson County, Oregon · 0.2 MI E of HWY 26 · Structure no. 31C29 676 00020

Built
1948
77 years old, rebuilt 1972
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
41 ft
2 main spans
Daily traffic
262
2020 count
Owner
County
County Highway Agency

About this bridge

Dogwood Lane over Irrigation Canal is a wood or timber stringer/multi-beam or girder carrying Dogwood Lane over Irrigation Canal in Jefferson County, Oregon. It was built in 1948 and reconstructed in 1972, 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 262 vehicles a day, roughly 10% of them trucks, projected to reach 307 by 2025. The structure is 41 ft (12.5 m) long and 25 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

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CarriesDogwood Lane
CrossesIrrigation Canal
Location0.2 MI E of HWY 26
RouteCounty Highway 0
CountyJefferson County
StateOregon
Coordinates44.67912, -121.14231
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
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 rating20 US tons
Inventory rating15.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans2
Design loadH 20
Structure length41 ft (12.5 m)
Longest span20 ft (6.1 m)
Deck width25 ft (7.5 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic262 (2020)
Projected traffic307 by 2025
Trucks10%
Lanes on structure2
Traffic directionTwo-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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Dogwood Lane over Irrigation Canal built?

It was built in 1948, making it 77 years old in 2025. It was reconstructed in 1972.

What condition is Dogwood Lane over Irrigation Canal 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 November 2024.

How much traffic does Dogwood Lane over Irrigation Canal carry?

About 262 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Dogwood Lane over Irrigation Canal?

The structure is 41 ft (12.5 m) long with a longest span of 20 ft (6.1 m) and a deck 25 ft wide.

Who owns Dogwood Lane over Irrigation Canal?

It is owned by the County Highway Agency.