US Bridges

Fs Route No. 396 over Marble Creek

Good

Shoshone County, Idaho · Marble Creek · Structure no. 010404000000156

Built
1986
39 years old
Condition
Good
inspected July 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
110 ft
1 main span
Daily traffic
50
Owner
Federal
U.S. Forest Service

About this bridge

Fs Route No. 396 over Marble Creek is a prestressed concrete stringer/multi-beam or girder carrying Fs Route No. 396 over Marble Creek in Shoshone County, Idaho. It was built in 1986, so it is 39 years old, younger than the Idaho average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 50 vehicles a day, projected to reach 75 by 2045. The structure is 110 ft (33.5 m) long and 17 ft wide. If it were closed, the detour would be 620.7 mi (999 km).

CarriesFs Route No. 396
CrossesMarble Creek
LocationMarble Creek
RouteFederal Lands Road 396
StateIdaho
Coordinates47.22724, -116.02061
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating37.5 US tons
Inventory rating34.3 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 25 or greater
Structure length110 ft (33.5 m)
Longest span108 ft (32.9 m)
Deck width17 ft (5.1 m)
Roadway width14 ft (4.3 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 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. 396 over Marble Creek built?

It was built in 1986, making it 39 years old in 2025.

What condition is Fs Route No. 396 over Marble Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2023.

How much traffic does Fs Route No. 396 over Marble Creek carry?

About 50 vehicles per day (latest count).

How long is Fs Route No. 396 over Marble Creek?

The structure is 110 ft (33.5 m) long with a longest span of 108 ft (32.9 m) and a deck 17 ft wide.

Who owns Fs Route No. 396 over Marble Creek?

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