US Bridges

Sams Creek RD over Siletz River

Fair

Lincoln County, Oregon · 048 M East of Siletz · Structure no. 12105A424010001

Built
1961
64 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
254 ft
1 main span
Daily traffic
220
2020 count
Owner
County
County Highway Agency

About this bridge

Sams Creek RD over Siletz River is a steel stringer/multi-beam or girder carrying Sams Creek RD over Siletz River in Lincoln County, Oregon. It was built in 1961, so it is 64 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 220 vehicles a day, roughly 15% of them trucks, projected to reach 309 by 2040. The structure is 254 ft (77.4 m) long and 29 ft wide. If it were closed, the detour would be 13 mi (21 km).

Location

Open in Google Maps
CarriesSams Creek RD
CrossesSiletz River
Location048 M East of Siletz
RouteCounty Highway 0
CountyLincoln County
StateOregon
Coordinates44.73339, -123.84237
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating38.6 US tons
Inventory rating30 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+4 approach)
Design loadHS 20
Structure length254 ft (77.4 m)
Longest span126 ft (38.4 m)
Deck width29 ft (8.7 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic220 (2020)
Projected traffic309 by 2040
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed13 mi (21 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 Sams Creek RD over Siletz River built?

It was built in 1961, making it 64 years old in 2025.

What condition is Sams Creek RD over Siletz River 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 2024.

How much traffic does Sams Creek RD over Siletz River carry?

About 220 vehicles per day (2020 count), of which roughly 15% are trucks.

How long is Sams Creek RD over Siletz River?

The structure is 254 ft (77.4 m) long with a longest span of 126 ft (38.4 m) and a deck 29 ft wide.

Who owns Sams Creek RD over Siletz River?

It is owned by the County Highway Agency.