US Bridges

Old HWY 30 over I-84 (hwy 6) MP 323.40

Fair

Baker County, Oregon · 28.6 MI N Malheur CO Line · Structure no. 00704A006 32340

Built
1966
59 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
363 ft
4 main spans
Daily traffic
9,904
2020 count
Owner
State
State Highway Agency

About this bridge

Old HWY 30 over I-84 (hwy 6) MP 323.40 is a prestressed concrete stringer/multi-beam or girder carrying Old HWY 30 over I-84 (hwy 6) MP 323.40 in Baker County, Oregon. It was built in 1966, so it is 59 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 9,904 vehicles a day, roughly 47% of them trucks, projected to reach 11,800 by 2040. The structure is 363 ft (110.6 m) long and 27 ft wide. If it were closed, the detour would be 70.8 mi (114 km).

Location

Open in Google Maps
CarriesOld HWY 30
CrossesI-84 (hwy 6) MP 323.40
Location28.6 MI N Malheur CO Line
RouteCounty Highway 0
CountyBaker County
StateOregon
Coordinates44.6282, -117.5162
Functional classRural Major 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment6: Equal to present minimum criteria
Operating rating39.2 US tons
Inventory rating30.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length363 ft (110.6 m)
Longest span96 ft (29.3 m)
Deck width27 ft (8.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,904 (2020)
Projected traffic11,800 by 2040
Trucks47%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed70.8 mi (114 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$1.6 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Old HWY 30 over I-84 (hwy 6) MP 323.40 built?

It was built in 1966, making it 59 years old in 2025.

What condition is Old HWY 30 over I-84 (hwy 6) MP 323.40 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 April 2023.

How much traffic does Old HWY 30 over I-84 (hwy 6) MP 323.40 carry?

About 9,904 vehicles per day (2020 count), of which roughly 47% are trucks.

How long is Old HWY 30 over I-84 (hwy 6) MP 323.40?

The structure is 363 ft (110.6 m) long with a longest span of 96 ft (29.3 m) and a deck 27 ft wide.

Who owns Old HWY 30 over I-84 (hwy 6) MP 323.40?

It is owned by the State Highway Agency.