US Bridges

Elk Creek Road over Flat Creek

Good

Jackson County, Oregon · 8.80 Milepost · Structure no. 29C229941 00852

Built
1978
47 years old
Condition
Good
inspected June 2023
Type
Channel Beam
Prestressed Concrete
Length
73 ft
1 main span
Daily traffic
313
2020 count
Owner
County
County Highway Agency

About this bridge

Elk Creek Road over Flat Creek is a prestressed concrete channel beam carrying Elk Creek Road over Flat Creek in Jackson County, Oregon. It was built in 1978, so it is 47 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 313 vehicles a day, roughly 10% of them trucks, projected to reach 368 by 2025. The structure is 73 ft (22.3 m) long and 32 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesElk Creek Road
CrossesFlat Creek
Location8.80 Milepost
RouteCounty Highway C0941
StateOregon
Coordinates42.75524, -122.69526
Functional classRural Minor Collector

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
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 rating53.6 US tons
Inventory rating41.4 US tons

Structure

Structure typeChannel Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length73 ft (22.3 m)
Longest span71 ft (21.6 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic313 (2020)
Projected traffic368 by 2025
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 Elk Creek Road over Flat Creek built?

It was built in 1978, making it 47 years old in 2025.

What condition is Elk Creek Road over Flat Creek 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 2023.

How much traffic does Elk Creek Road over Flat Creek carry?

About 313 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Elk Creek Road over Flat Creek?

The structure is 73 ft (22.3 m) long with a longest span of 71 ft (21.6 m) and a deck 32 ft wide.

Who owns Elk Creek Road over Flat Creek?

It is owned by the County Highway Agency.