US Bridges

4330 over Emigrant Creek

Fair

Harney County, Oregon · .1MI S of 43 4330 JCT · Structure no. 060704000001005

Built
1955
70 years old, rebuilt 1995
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
77 ft
3 main spans
Daily traffic
20
1995 count
Owner
Federal
U.S. Forest Service

About this bridge

4330 over Emigrant Creek is a wood or timber stringer/multi-beam or girder carrying 4330 over Emigrant Creek in Harney County, Oregon. It was built in 1955 and reconstructed in 1995, so it is 70 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 20 vehicles a day, projected to reach 30 by 2045. The structure is 77 ft (23.5 m) long and 16 ft wide.

Carries4330
CrossesEmigrant Creek
Location.1MI S of 43 4330 JCT
RouteFederal Lands Road 4330
StateOregon
Coordinates43.81884, -119.41808
Functional classRural Local

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.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating50 US tons
Inventory rating34.1 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans3
Design loadOther
Structure length77 ft (23.5 m)
Longest span55 ft (16.8 m)
Deck width16 ft (4.9 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (1995)
Projected traffic30 by 2045
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerU.S. Forest Service
Maintained byU.S. Forest Service
Historic statusHistorical significance not determinable at this time
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 4330 over Emigrant Creek built?

It was built in 1955, making it 70 years old in 2025. It was reconstructed in 1995.

What condition is 4330 over Emigrant Creek 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 September 2023.

How much traffic does 4330 over Emigrant Creek carry?

About 20 vehicles per day (1995 count).

How long is 4330 over Emigrant Creek?

The structure is 77 ft (23.5 m) long with a longest span of 55 ft (16.8 m) and a deck 16 ft wide.

Who owns 4330 over Emigrant Creek?

It is owned by the U.S. Forest Service.