US Bridges

Fdr 103 over Lolo Creek

Fair

Idaho County, Idaho · 1 MI West of Musselshell · Structure no. 010501000000090

Built
1962
63 years old
Condition
Fair
inspected August 2021
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
60 ft
1 main span
Daily traffic
40
Owner
Federal
U.S. Forest Service

About this bridge

Fdr 103 over Lolo Creek is a wood or timber stringer/multi-beam or girder carrying Fdr 103 over Lolo Creek in Idaho County, Idaho. It was built in 1962, so it is 63 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 40 vehicles a day, projected to reach 60 by 2045. The structure is 60 ft (18.4 m) long and 18 ft wide.

Location

Open in Google Maps
CarriesFdr 103
CrossesLolo Creek
Location1 MI West of Musselshell
RouteFederal Lands Road 103
CountyIdaho County
StateIdaho
Coordinates46.35064, -115.73311
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating30 US tons
Inventory rating23.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadHS 25 or greater
Structure length60 ft (18.4 m)
Longest span59 ft (18.1 m)
Deck width18 ft (5.4 m)
Roadway width16 ft (4.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40 (—)
Projected traffic60 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 103 over Lolo Creek built?

It was built in 1962, making it 63 years old in 2025.

What condition is Fdr 103 over Lolo 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 August 2021.

How much traffic does Fdr 103 over Lolo Creek carry?

About 40 vehicles per day (latest count).

How long is Fdr 103 over Lolo Creek?

The structure is 60 ft (18.4 m) long with a longest span of 59 ft (18.1 m) and a deck 18 ft wide.

Who owns Fdr 103 over Lolo Creek?

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