US Bridges

Fdr 105 over NF Clearwater River

FairPosted for load

Clearwater County, Idaho · Weitas Creek & NF Clw Riv · Structure no. 010503000000100

Built
1937
88 years old
Condition
Fair
inspected June 2024
Type
Truss - Thru
Steel
Length
397 ft
2 main spans
Daily traffic
20
Owner
Federal
U.S. Forest Service

About this bridge

Fdr 105 over NF Clearwater River is a steel truss - thru carrying Fdr 105 over NF Clearwater River in Clearwater County, Idaho. It was built in 1937, so it is 88 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 20 vehicles a day, projected to reach 30 by 2045. The structure is 397 ft (121 m) long and 15 ft wide.

Location

Open in Google Maps
CarriesFdr 105
CrossesNF Clearwater River
LocationWeitas Creek & NF Clw Riv
RouteFederal Lands Road 105
CountyClearwater County
StateIdaho
Coordinates46.63684, -115.43256
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating15.3 US tons
Inventory rating11.8 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckWood or timber
Main spans2 (+2 approach)
Design loadH 15
Structure length397 ft (121 m)
Longest span176 ft (53.6 m)
Deck width15 ft (4.6 m)
Roadway width14 ft (4.2 m)
Vertical clearance over deck13 ft (4 m)

Traffic and service

Average daily traffic20 (—)
Projected traffic30 by 2045
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 Fdr 105 over NF Clearwater River built?

It was built in 1937, making it 88 years old in 2025.

What condition is Fdr 105 over NF 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 June 2024.

How much traffic does Fdr 105 over NF Clearwater River carry?

About 20 vehicles per day (latest count).

How long is Fdr 105 over NF Clearwater River?

The structure is 397 ft (121 m) long with a longest span of 176 ft (53.6 m) and a deck 15 ft wide.

Who owns Fdr 105 over NF Clearwater River?

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