US Bridges

Seymore Street over Umatilla River

Fair

Umatilla County, Oregon · 0.5 MI W of HWY 395 · Structure no. 59C215133200014

Built
1986
39 years old
Condition
Fair
inspected July 2024
Type
Slab
Prestressed Concrete
Length
221 ft
3 main spans
Daily traffic
889
2020 count
Owner
County
County Highway Agency

About this bridge

Seymore Street over Umatilla River is a prestressed concrete slab carrying Seymore Street over Umatilla River in Umatilla County, Oregon. It was built in 1986, so it is 39 years old, younger 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 889 vehicles a day, roughly 20% of them trucks, projected to reach 974 by 2025. The structure is 221 ft (67.4 m) long and 32 ft wide.

CarriesSeymore Street
CrossesUmatilla River
Location0.5 MI W of HWY 395
RouteCounty Highway 0
StateOregon
Coordinates45.7786, -119.22552
Functional classRural Minor 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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
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 rating71 US tons
Inventory rating42 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 25 or greater
Structure length221 ft (67.4 m)
Longest span73 ft (22.3 m)
Deck width32 ft (9.8 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic889 (2020)
Projected traffic974 by 2025
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 Seymore Street over Umatilla River built?

It was built in 1986, making it 39 years old in 2025.

What condition is Seymore Street over Umatilla 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 July 2024.

How much traffic does Seymore Street over Umatilla River carry?

About 889 vehicles per day (2020 count), of which roughly 20% are trucks.

How long is Seymore Street over Umatilla River?

The structure is 221 ft (67.4 m) long with a longest span of 73 ft (22.3 m) and a deck 32 ft wide.

Who owns Seymore Street over Umatilla River?

It is owned by the County Highway Agency.