US Bridges

US 20 (hwy 007) over Silvies River

Good

Harney County, Oregon · 1.0 Mi. E. JCT Ore RTE 78 · Structure no. 18464 007 13251

Built
1999
26 years old
Condition
Good
inspected June 2024
Type
Slab
Prestressed Concrete
Length
74 ft
3 main spans
Daily traffic
2,834
2022 count
Owner
State
State Highway Agency

About this bridge

US 20 (hwy 007) over Silvies River is a prestressed concrete slab carrying US 20 (hwy 007) over Silvies River in Harney County, Oregon. It was built in 1999, so it is 26 years old, younger 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.

It carries about 2,834 vehicles a day, roughly 28% of them trucks, projected to reach 3,100 by 2042. The structure is 74 ft (22.6 m) long and 40 ft wide. If it were closed, the detour would be 65.9 mi (106 km).

CarriesUS 20 (hwy 007)
CrossesSilvies River
Location1.0 Mi. E. JCT Ore RTE 78
RouteU.S. Route 20
StateOregon
Coordinates43.59886, -119.04829
Functional classRural Principal Arterial - Other

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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating20.7 US tons
Inventory rating16.1 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 25 or greater
Structure length74 ft (22.6 m)
Longest span43 ft (13.1 m)
Deck width40 ft (12.2 m)
Roadway width40 ft (12.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,834 (2022)
Projected traffic3,100 by 2042
Trucks28%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed65.9 mi (106 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 US 20 (hwy 007) over Silvies River built?

It was built in 1999, making it 26 years old in 2025.

What condition is US 20 (hwy 007) over Silvies River 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 June 2024.

How much traffic does US 20 (hwy 007) over Silvies River carry?

About 2,834 vehicles per day (2022 count), of which roughly 28% are trucks.

How long is US 20 (hwy 007) over Silvies River?

The structure is 74 ft (22.6 m) long with a longest span of 43 ft (13.1 m) and a deck 40 ft wide.

Who owns US 20 (hwy 007) over Silvies River?

It is owned by the State Highway Agency.