US Bridges

Route 468-A over Deep CR

Fair

Idaho County, Idaho · No Data Entered · Structure no. 010304000000079

Built
1938
87 years old
Condition
Fair
inspected October 2023
Type
Arch - Deck
Concrete
Length
66 ft
1 main span
Daily traffic
10
1992 count
Owner
Federal
U.S. Forest Service

About this bridge

Route 468-A over Deep CR is a concrete arch - deck carrying Route 468-A over Deep CR in Idaho County, Idaho. It was built in 1938, so it is 87 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 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 66 ft (20.1 m) long and 23 ft wide. If it were closed, the detour would be 98.2 mi (158 km).

Location

Open in Google Maps
CarriesRoute 468-A
CrossesDeep CR
LocationNo Data Entered
RouteFederal Lands Road 468
CountyIdaho County
StateIdaho
Coordinates45.69056, -114.72444
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating95.7 US tons
Inventory rating73.5 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length66 ft (20.1 m)
Longest span35 ft (10.7 m)
Deck width23 ft (7 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10 (1992)
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 Route 468-A over Deep CR built?

It was built in 1938, making it 87 years old in 2025.

What condition is Route 468-A over Deep CR 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 2023.

How much traffic does Route 468-A over Deep CR carry?

About 10 vehicles per day (1992 count).

How long is Route 468-A over Deep CR?

The structure is 66 ft (20.1 m) long with a longest span of 35 ft (10.7 m) and a deck 23 ft wide.

Who owns Route 468-A over Deep CR?

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