US Bridges

S3945;EAST Lake Fk over Lake Fork Creek

Good

Valley County, Idaho · Lake Fork · Structure no. 000000000028641

Built
2017
8 years old
Condition
Good
inspected August 2021
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
88 ft
1 main span
Daily traffic
360
2023 count
Owner
County
County Highway Agency

About this bridge

S3945;EAST Lake Fk over Lake Fork Creek is a prestressed concrete stringer/multi-beam or girder carrying S3945;EAST Lake Fk over Lake Fork Creek in Valley County, Idaho. It was built in 2017, so it is 8 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 360 vehicles a day, roughly 24% of them trucks, projected to reach 540 by 2042. The structure is 88 ft (26.8 m) long and 42 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesS3945;EAST Lake Fk
CrossesLake Fork Creek
LocationLake Fork
RouteCounty Highway 3945
StateIdaho
Coordinates44.83253, -116.07686
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionAugust 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating43.2 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length88 ft (26.8 m)
Longest span84 ft (25.6 m)
Deck width42 ft (12.8 m)
Roadway width41 ft (12.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic360 (2023)
Projected traffic540 by 2042
Trucks24%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was S3945;EAST Lake Fk over Lake Fork Creek built?

It was built in 2017, making it 8 years old in 2025.

What condition is S3945;EAST Lake Fk over Lake Fork 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 August 2021.

How much traffic does S3945;EAST Lake Fk over Lake Fork Creek carry?

About 360 vehicles per day (2023 count), of which roughly 24% are trucks.

How long is S3945;EAST Lake Fk over Lake Fork Creek?

The structure is 88 ft (26.8 m) long with a longest span of 84 ft (25.6 m) and a deck 42 ft wide.

Who owns S3945;EAST Lake Fk over Lake Fork Creek?

It is owned by the County Highway Agency.