US Bridges

S Fk of Salmon Riv over Mormon Creek

Good

Valley County, Idaho · 5 MI S of Stolle Meadows · Structure no. 040204000015393

Built
2011
14 years old
Condition
Good
inspected September 2021
Type
Slab
Wood or Timber
Length
28 ft
1 main span
Daily traffic
12
2018 count
Owner
Federal
U.S. Forest Service

About this bridge

S Fk of Salmon Riv over Mormon Creek is a wood or timber slab carrying S Fk of Salmon Riv over Mormon Creek in Valley County, Idaho. It was built in 2011, so it is 14 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 12 vehicles a day, projected to reach 18 by 2045. The structure is 28 ft (8.5 m) long and 16 ft wide. If it were closed, the detour would be 98.2 mi (158 km).

Location

Open in Google Maps
CarriesS Fk of Salmon Riv
CrossesMormon Creek
Location5 MI S of Stolle Meadows
RouteFederal Lands Road 474
CountyValley County
StateIdaho
Coordinates44.523, -115.694
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 inspectionSeptember 2021
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 adequacy7: Better than present minimum criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating59.3 US tons
Inventory rating45.7 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadHS 20
Structure length28 ft (8.5 m)
Longest span28 ft (8.5 m)
Deck width16 ft (4.9 m)
Roadway width15 ft (4.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12 (2018)
Projected traffic18 by 2045
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.2 mi (158 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 S Fk of Salmon Riv over Mormon Creek built?

It was built in 2011, making it 14 years old in 2025.

What condition is S Fk of Salmon Riv over Mormon 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 September 2021.

How much traffic does S Fk of Salmon Riv over Mormon Creek carry?

About 12 vehicles per day (2018 count).

How long is S Fk of Salmon Riv over Mormon Creek?

The structure is 28 ft (8.5 m) long with a longest span of 28 ft (8.5 m) and a deck 16 ft wide.

Who owns S Fk of Salmon Riv over Mormon Creek?

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