US Bridges

Fdr 60099 over Copper Creek

Fair

Lemhi County, Idaho · Cobalt Work Center · Structure no. 041301000001059

Built
1971
54 years old, rebuilt 1995
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
34 ft
1 main span
Daily traffic
5
Owner
Federal
U.S. Forest Service

About this bridge

Fdr 60099 over Copper Creek is a wood or timber stringer/multi-beam or girder carrying Fdr 60099 over Copper Creek in Lemhi County, Idaho. It was built in 1971 and reconstructed in 1995, so it is 54 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 5 vehicles a day, projected to reach 7 by 2045. The structure is 34 ft (10.4 m) long and 15 ft wide.

Location

Open in Google Maps
CarriesFdr 60099
CrossesCopper Creek
LocationCobalt Work Center
RouteFederal Lands Road 60099
CountyLemhi County
StateIdaho
Coordinates45.06669, -114.27161
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.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
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 adequacy9: Superior to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating35.7 US tons
Inventory rating27.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadHS 20
Structure length34 ft (10.4 m)
Longest span33 ft (10.1 m)
Deck width15 ft (4.6 m)
Roadway width14 ft (4.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5 (—)
Projected traffic7 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 60099 over Copper Creek built?

It was built in 1971, making it 54 years old in 2025. It was reconstructed in 1995.

What condition is Fdr 60099 over Copper 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 2023.

How much traffic does Fdr 60099 over Copper Creek carry?

About 5 vehicles per day (latest count).

How long is Fdr 60099 over Copper Creek?

The structure is 34 ft (10.4 m) long with a longest span of 33 ft (10.1 m) and a deck 15 ft wide.

Who owns Fdr 60099 over Copper Creek?

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