US Bridges

Lunch Ck. Flat Rd. over Lunch Creek

Good

Valley County, Idaho · 2 MI NW Landmark Airstrip · Structure no. 040204000001078

Built
1980
45 years old
Condition
Good
inspected October 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
34 ft
1 main span
Daily traffic
5
2018 count
Owner
Federal
U.S. Forest Service

About this bridge

Lunch Ck. Flat Rd. over Lunch Creek is a wood or timber stringer/multi-beam or girder carrying Lunch Ck. Flat Rd. over Lunch Creek in Valley County, Idaho. It was built in 1980, so it is 45 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 5 vehicles a day, projected to reach 7 by 2045. The structure is 34 ft (10.4 m) long and 15 ft wide. If it were closed, the detour would be 98.2 mi (158 km).

CarriesLunch Ck. Flat Rd.
CrossesLunch Creek
Location2 MI NW Landmark Airstrip
RouteFederal Lands Road 415A
StateIdaho
Coordinates44.67648, -115.56969
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 inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to 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 rating28.9 US tons

Structure

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 (4.7 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5 (2018)
Projected traffic7 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 Lunch Ck. Flat Rd. over Lunch Creek built?

It was built in 1980, making it 45 years old in 2025.

What condition is Lunch Ck. Flat Rd. over Lunch 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 October 2024.

How much traffic does Lunch Ck. Flat Rd. over Lunch Creek carry?

About 5 vehicles per day (2018 count).

How long is Lunch Ck. Flat Rd. over Lunch 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 Lunch Ck. Flat Rd. over Lunch Creek?

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