US Bridges

STC3840;2nd Fork over Squaw Creek

Good

Gem County, Idaho · 4.5 N. Ola · Structure no. 000000000019966

Built
2016
9 years old
Condition
Good
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
67 ft
1 main span
Daily traffic
240
2023 count
Owner
County
County Highway Agency

About this bridge

STC3840;2nd Fork over Squaw Creek is a steel stringer/multi-beam or girder carrying STC3840;2nd Fork over Squaw Creek in Gem County, Idaho. It was built in 2016, so it is 9 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 240 vehicles a day, roughly 20% of them trucks, projected to reach 360 by 2042. The structure is 67 ft (20.4 m) long and 30 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesSTC3840;2nd Fork
CrossesSquaw Creek
Location4.5 N. Ola
RouteCounty Highway 3840
StateIdaho
Coordinates44.24469, -116.30244
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 protection8 Very GoodNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.1 US tons
Inventory rating35.4 US tons

Structure

MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHL 93
Structure length67 ft (20.4 m)
Longest span65 ft (19.9 m)
Deck width30 ft (9.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic240 (2023)
Projected traffic360 by 2042
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 STC3840;2nd Fork over Squaw Creek built?

It was built in 2016, making it 9 years old in 2025.

What condition is STC3840;2nd Fork over Squaw 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 July 2024.

How much traffic does STC3840;2nd Fork over Squaw Creek carry?

About 240 vehicles per day (2023 count), of which roughly 20% are trucks.

How long is STC3840;2nd Fork over Squaw Creek?

The structure is 67 ft (20.4 m) long with a longest span of 65 ft (19.9 m) and a deck 30 ft wide.

Who owns STC3840;2nd Fork over Squaw Creek?

It is owned by the County Highway Agency.