US Bridges

Old Santiam Road over S.Fk. Clearwater River

FairPosted for load

Idaho County, Idaho · 10 S. Elk City · Structure no. 000000000033230

Built
1934
91 years old
Condition
Fair
inspected October 2023
Type
Truss - Thru
Steel
Length
104 ft
1 main span
Daily traffic
10
2023 count
Owner
County
County Highway Agency

About this bridge

Old Santiam Road over S.Fk. Clearwater River is a steel truss - thru carrying Old Santiam Road over S.Fk. Clearwater River in Idaho County, Idaho. It was built in 1934, so it is 91 years old, older than the Idaho average of 45.3 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. Its operating status is: posted for load restriction.

It carries about 10 vehicles a day, projected to reach 15 by 2042. The structure is 104 ft (31.7 m) long and 13 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesOld Santiam Road
CrossesS.Fk. Clearwater River
Location10 S. Elk City
RouteCounty Highway 0
CountyIdaho County
StateIdaho
Coordinates45.81356, -115.63253
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating12 US tons
Inventory rating9 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckWood or timber
Main spans1
Design loadHS 15
Structure length104 ft (31.7 m)
Longest span101 ft (30.8 m)
Deck width13 ft (4.1 m)
Roadway width12 ft (3.6 m)
Vertical clearance over deck15 ft (4.7 m)

Traffic and service

Average daily traffic10 (2023)
Projected traffic15 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Old Santiam Road over S.Fk. Clearwater River built?

It was built in 1934, making it 91 years old in 2025.

What condition is Old Santiam Road over S.Fk. Clearwater 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 October 2023.

How much traffic does Old Santiam Road over S.Fk. Clearwater River carry?

About 10 vehicles per day (2023 count).

How long is Old Santiam Road over S.Fk. Clearwater River?

The structure is 104 ft (31.7 m) long with a longest span of 101 ft (30.8 m) and a deck 13 ft wide.

Who owns Old Santiam Road over S.Fk. Clearwater River?

It is owned by the County Highway Agency.