US Bridges

Elkhead RD #7 over Adams Creek

Fair

Douglas County, Oregon · 4.1 MI E of Yoncalla · Structure no. 19C060000700405

Built
1946
79 years old, rebuilt 1955
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
24 ft
1 main span
Daily traffic
508
2020 count
Owner
County
County Highway Agency

About this bridge

Elkhead RD #7 over Adams Creek is a steel stringer/multi-beam or girder carrying Elkhead RD #7 over Adams Creek in Douglas County, Oregon. It was built in 1946 and reconstructed in 1955, so it is 79 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 5 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 508 vehicles a day, roughly 15% of them trucks, projected to reach 573 by 2025. The structure is 24 ft (7.3 m) long and 30 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesElkhead RD #7
CrossesAdams Creek
Location4.1 MI E of Yoncalla
RouteCounty Highway C0007
CountyDouglas County
StateOregon
Coordinates43.60162, -123.21387
Functional classRural Minor 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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being 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 alignment6: Equal to present minimum criteria
Operating rating35.7 US tons
Inventory rating27.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length24 ft (7.3 m)
Longest span23 ft (7 m)
Deck width30 ft (9.2 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic508 (2020)
Projected traffic573 by 2025
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Elkhead RD #7 over Adams Creek built?

It was built in 1946, making it 79 years old in 2025. It was reconstructed in 1955.

What condition is Elkhead RD #7 over Adams 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 October 2024.

How much traffic does Elkhead RD #7 over Adams Creek carry?

About 508 vehicles per day (2020 count), of which roughly 15% are trucks.

How long is Elkhead RD #7 over Adams Creek?

The structure is 24 ft (7.3 m) long with a longest span of 23 ft (7 m) and a deck 30 ft wide.

Who owns Elkhead RD #7 over Adams Creek?

It is owned by the County Highway Agency.