US Bridges

Five Mile Road over Five Mile Creek

Fair

Boise County, Idaho · 1 MI N.E. of Helende C.G. · Structure no. 040205000001096

Built
1981
44 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
32 ft
1 main span
Daily traffic
10
2018 count
Owner
Federal
U.S. Forest Service

About this bridge

Five Mile Road over Five Mile Creek is a wood or timber stringer/multi-beam or girder carrying Five Mile Road over Five Mile Creek in Boise County, Idaho. It was built in 1981, so it is 44 years old, younger 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 10 vehicles a day, projected to reach 15 by 2045. The structure is 32 ft (9.8 m) long and 15 ft wide. If it were closed, the detour would be 98.2 mi (158 km).

Location

Open in Google Maps
CarriesFive Mile Road
CrossesFive Mile Creek
Location1 MI N.E. of Helende C.G.
RouteFederal Lands Road 526
CountyBoise County
StateIdaho
Coordinates44.11411, -115.45621
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.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
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 adequacy7: Better than present minimum criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating35.4 US tons
Inventory rating27.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadHS 20
Structure length32 ft (9.8 m)
Longest span31 ft (9.4 m)
Deck width15 ft (4.7 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10 (2018)
Projected traffic15 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 Five Mile Road over Five Mile Creek built?

It was built in 1981, making it 44 years old in 2025.

What condition is Five Mile Road over Five Mile 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 2024.

How much traffic does Five Mile Road over Five Mile Creek carry?

About 10 vehicles per day (2018 count).

How long is Five Mile Road over Five Mile Creek?

The structure is 32 ft (9.8 m) long with a longest span of 31 ft (9.4 m) and a deck 15 ft wide.

Who owns Five Mile Road over Five Mile Creek?

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