US Bridges

Jefferson C-554 over Mitchell Canal

GoodPosted for load

Malheur County, Oregon · 001 MI N JCT Ivanhoe Ave · Structure no. 45C209055400557

Built
1974
51 years old
Condition
Good
inspected October 2023
Type
Channel Beam
Prestressed Concrete
Length
25 ft
1 main span
Daily traffic
54
2020 count
Owner
County
County Highway Agency

About this bridge

Jefferson C-554 over Mitchell Canal is a prestressed concrete channel beam carrying Jefferson C-554 over Mitchell Canal in Malheur County, Oregon. It was built in 1974, so it is 51 years old, older than the Oregon average of 49.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. Its operating status is: posted for load restriction.

It carries about 54 vehicles a day, roughly 10% of them trucks, projected to reach 64 by 2025. The structure is 25 ft (7.6 m) long and 26 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesJefferson C-554
CrossesMitchell Canal
Location001 MI N JCT Ivanhoe Ave
RouteCounty Highway C0554
StateOregon
Coordinates43.8204, -117.0954
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating31.7 US tons
Inventory rating24.5 US tons

Structure

Structure typeChannel Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length25 ft (7.6 m)
Longest span21 ft (6.4 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic54 (2020)
Projected traffic64 by 2025
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Jefferson C-554 over Mitchell Canal built?

It was built in 1974, making it 51 years old in 2025.

What condition is Jefferson C-554 over Mitchell Canal in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in October 2023.

How much traffic does Jefferson C-554 over Mitchell Canal carry?

About 54 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Jefferson C-554 over Mitchell Canal?

The structure is 25 ft (7.6 m) long with a longest span of 21 ft (6.4 m) and a deck 26 ft wide.

Who owns Jefferson C-554 over Mitchell Canal?

It is owned by the County Highway Agency.