US Bridges

Campground Road over Cub River

Fair

Franklin County, Idaho · No Data Entered · Structure no. 040503000001004

Built
1964
61 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
38 ft
1 main span
Daily traffic
30
Owner
Federal
U.S. Forest Service

About this bridge

Campground Road over Cub River is a wood or timber stringer/multi-beam or girder carrying Campground Road over Cub River in Franklin County, Idaho. It was built in 1964, so it is 61 years old, older 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 5 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 30 vehicles a day, projected to reach 45 by 2045. The structure is 38 ft (11.6 m) long and 18 ft wide.

Location

Open in Google Maps
CarriesCampground Road
CrossesCub River
LocationNo Data Entered
RouteFederal Lands Road 20446
CountyFranklin County
StateIdaho
Coordinates42.13794, -111.6954
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating22.8 US tons
Inventory rating17.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadH 20
Structure length38 ft (11.6 m)
Longest span37 ft (11.3 m)
Deck width18 ft (5.5 m)
Roadway width17 ft (5.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (—)
Projected traffic45 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 Campground Road over Cub River built?

It was built in 1964, making it 61 years old in 2025.

What condition is Campground Road over Cub River 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 August 2023.

How much traffic does Campground Road over Cub River carry?

About 30 vehicles per day (latest count).

How long is Campground Road over Cub River?

The structure is 38 ft (11.6 m) long with a longest span of 37 ft (11.3 m) and a deck 18 ft wide.

Who owns Campground Road over Cub River?

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