US Bridges

Fs Route No. 208 over Cda River

Fair

Shoshone County, Idaho · 2.5 MI from Shoshone W.C. · Structure no. 010401000000247

Built
1952
73 years old
Condition
Fair
inspected July 2024
Type
Tee Beam
Concrete Continuous
Length
272 ft
3 main spans
Daily traffic
50
Owner
Federal
U.S. Forest Service

About this bridge

Fs Route No. 208 over Cda River is a concrete continuous tee beam carrying Fs Route No. 208 over Cda River in Shoshone County, Idaho. It was built in 1952, so it is 73 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.

It carries about 50 vehicles a day, projected to reach 75 by 2045. The structure is 272 ft (82.9 m) long and 27 ft wide. If it were closed, the detour would be 620.7 mi (999 km).

Location

Open in Google Maps
CarriesFs Route No. 208
CrossesCda River
Location2.5 MI from Shoshone W.C.
RouteFederal Lands Road 208
CountyShoshone County
StateIdaho
Coordinates47.73686, -116.00807
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
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating15.3 US tons
Inventory rating9.6 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length272 ft (82.9 m)
Longest span110 ft (33.5 m)
Deck width27 ft (8.1 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (—)
Projected traffic75 by 2045
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed620.7 mi (999 km)
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Fs Route No. 208 over Cda River built?

It was built in 1952, making it 73 years old in 2025.

What condition is Fs Route No. 208 over Cda 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 July 2024.

How much traffic does Fs Route No. 208 over Cda River carry?

About 50 vehicles per day (latest count).

How long is Fs Route No. 208 over Cda River?

The structure is 272 ft (82.9 m) long with a longest span of 110 ft (33.5 m) and a deck 27 ft wide.

Who owns Fs Route No. 208 over Cda River?

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