US Bridges

Overstreet B486 over Owyhee River

Fair

Malheur County, Oregon · 062 M W Inter Succor Crhy · Structure no. 16110 083900033

Built
1973
52 years old
Condition
Fair
inspected October 2023
Type
Slab
Prestressed Concrete
Length
240 ft
4 main spans
Daily traffic
383
2020 count
Owner
County
County Highway Agency

About this bridge

Overstreet B486 over Owyhee River is a prestressed concrete slab carrying Overstreet B486 over Owyhee River in Malheur County, Oregon. It was built in 1973, so it is 52 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.

It carries about 383 vehicles a day, roughly 20% of them trucks, projected to reach 433 by 2025. The structure is 240 ft (73.2 m) long and 36 ft wide. If it were closed, the detour would be 4.3 mi (7 km).

CarriesOverstreet B486
CrossesOwyhee River
Location062 M W Inter Succor Crhy
RouteCounty Highway 0B486
StateOregon
Coordinates43.75635, -117.15335
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75.4 US tons
Inventory rating58.2 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckOther
Main spans4
Design loadHS 20
Structure length240 ft (73.2 m)
Longest span60 ft (18.3 m)
Deck width36 ft (11 m)
Roadway width33 ft (10.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic383 (2020)
Projected traffic433 by 2025
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed4.3 mi (7 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 Overstreet B486 over Owyhee River built?

It was built in 1973, making it 52 years old in 2025.

What condition is Overstreet B486 over Owyhee 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 October 2023.

How much traffic does Overstreet B486 over Owyhee River carry?

About 383 vehicles per day (2020 count), of which roughly 20% are trucks.

How long is Overstreet B486 over Owyhee River?

The structure is 240 ft (73.2 m) long with a longest span of 60 ft (18.3 m) and a deck 36 ft wide.

Who owns Overstreet B486 over Owyhee River?

It is owned by the County Highway Agency.