US Bridges

US 30 (hwy 493) over Snake R. (hwy 493)

Good

Malheur County, Oregon · 0.7 MI E JCT FIA-84 · Structure no. 01000B455 02839

Built
1967
58 years old, rebuilt 1985
Condition
Good
inspected April 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
887 ft
9 main spans
Daily traffic
26,880
2022 count
Owner
State
State Highway Agency

About this bridge

US 30 (hwy 493) over Snake R. (hwy 493) is a prestressed concrete continuous stringer/multi-beam or girder carrying US 30 (hwy 493) over Snake R. (hwy 493) in Malheur County, Oregon. It was built in 1967 and reconstructed in 1985, so it is 58 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.

It carries about 26,880 vehicles a day, roughly 2% of them trucks, projected to reach 29,500 by 2042. The structure is 887 ft (270.4 m) long and 77 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesUS 30 (hwy 493)
CrossesSnake R. (hwy 493)
Location0.7 MI E JCT FIA-84
RouteU.S. Route 30
CountyMalheur County
StateOregon
Coordinates44.02498, -116.93527
Functional classUrban Other Principal Arterial

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 protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating29.7 US tons
Inventory rating22.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans9
Design loadHS 20
Structure length887 ft (270.4 m)
Longest span101 ft (30.8 m)
Deck width77 ft (23.6 m)
Roadway width68 ft (20.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26,880 (2022)
Projected traffic29,500 by 2042
Trucks2%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was US 30 (hwy 493) over Snake R. (hwy 493) built?

It was built in 1967, making it 58 years old in 2025. It was reconstructed in 1985.

What condition is US 30 (hwy 493) over Snake R. (hwy 493) 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 April 2024.

How much traffic does US 30 (hwy 493) over Snake R. (hwy 493) carry?

About 26,880 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is US 30 (hwy 493) over Snake R. (hwy 493)?

The structure is 887 ft (270.4 m) long with a longest span of 101 ft (30.8 m) and a deck 77 ft wide.

Who owns US 30 (hwy 493) over Snake R. (hwy 493)?

It is owned by the State Highway Agency.