US Bridges

Fdr over South Fork Boise River

Poor

Camas County, Idaho · Skunk Creek-So Fk Junct. · Structure no. 041405000001004

Built
1989
36 years old
Condition
Poor
inspected September 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
70 ft
2 main spans
Daily traffic
12
1980 count
Owner
Federal
U.S. Forest Service

About this bridge

Fdr over South Fork Boise River is a wood or timber stringer/multi-beam or girder carrying Fdr over South Fork Boise River in Camas County, Idaho. It was built in 1989, so it is 36 years old, younger than the Idaho average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 12 vehicles a day, projected to reach 18 by 2045. The structure is 70 ft (21.3 m) long and 16 ft wide.

CarriesFdr
CrossesSouth Fork Boise River
LocationSkunk Creek-So Fk Junct.
RouteFederal Lands Road 70011
StateIdaho
Coordinates43.64185, -114.90367
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating27.1 US tons
Inventory rating21.1 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans2
Design loadH 20
Structure length70 ft (21.3 m)
Longest span35 ft (10.7 m)
Deck width16 ft (4.9 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12 (1980)
Projected traffic18 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 over South Fork Boise River built?

It was built in 1989, making it 36 years old in 2025.

What condition is Fdr over South Fork Boise River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in September 2023.

How much traffic does Fdr over South Fork Boise River carry?

About 12 vehicles per day (1980 count).

How long is Fdr over South Fork Boise River?

The structure is 70 ft (21.3 m) long with a longest span of 35 ft (10.7 m) and a deck 16 ft wide.

Who owns Fdr over South Fork Boise River?

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