US Bridges

Fdr 60103 over Panther Creek

Fair

Lemhi County, Idaho · 6 Miles SW of Cobalt · Structure no. 041301000001060

Built
1960
65 years old, rebuilt 1995
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
32 ft
1 main span
Daily traffic
50
Owner
Federal
U.S. Forest Service

About this bridge

Fdr 60103 over Panther Creek is a wood or timber stringer/multi-beam or girder carrying Fdr 60103 over Panther Creek in Lemhi County, Idaho. It was built in 1960 and reconstructed in 1995, so it is 65 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 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 50 vehicles a day, projected to reach 75 by 2045. The structure is 32 ft (9.7 m) long and 20 ft wide.

Location

Open in Google Maps
CarriesFdr 60103
CrossesPanther Creek
Location6 Miles SW of Cobalt
RouteFederal Lands Road 60103
CountyLemhi County
StateIdaho
Coordinates45.02539, -114.30939
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating28.2 US tons
Inventory rating21.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadH 20
Structure length32 ft (9.7 m)
Longest span31 ft (9.3 m)
Deck width20 ft (6.1 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (—)
Projected traffic75 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 60103 over Panther Creek built?

It was built in 1960, making it 65 years old in 2025. It was reconstructed in 1995.

What condition is Fdr 60103 over Panther 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 60103 over Panther Creek carry?

About 50 vehicles per day (latest count).

How long is Fdr 60103 over Panther Creek?

The structure is 32 ft (9.7 m) long with a longest span of 31 ft (9.3 m) and a deck 20 ft wide.

Who owns Fdr 60103 over Panther Creek?

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