US Bridges

Hooper Lane over Big Springs

Good

Lemhi County, Idaho · 2.8 S 0.8 E May · Structure no. 000000000034645

Built
2011
14 years old
Condition
Good
inspected July 2021
Type
Stringer/Multi-beam or Girder
Steel
Length
40 ft
1 main span
Daily traffic
70
2023 count
Owner
County
County Highway Agency

About this bridge

Hooper Lane over Big Springs is a steel stringer/multi-beam or girder carrying Hooper Lane over Big Springs in Lemhi County, Idaho. It was built in 2011, so it is 14 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 70 vehicles a day, roughly 15% of them trucks, projected to reach 105 by 2039. The structure is 40 ft (12.2 m) long and 24 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

CarriesHooper Lane
CrossesBig Springs
Location2.8 S 0.8 E May
RouteCounty Highway 0
StateIdaho
Coordinates44.56392, -113.89625
Functional classRural Local

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 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.6 US tons
Inventory rating41.1 US tons

Structure

MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHL 93
Structure length40 ft (12.2 m)
Longest span39 ft (11.9 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic70 (2023)
Projected traffic105 by 2039
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 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 Hooper Lane over Big Springs built?

It was built in 2011, making it 14 years old in 2025.

What condition is Hooper Lane over Big Springs 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 2021.

How much traffic does Hooper Lane over Big Springs carry?

About 70 vehicles per day (2023 count), of which roughly 15% are trucks.

How long is Hooper Lane over Big Springs?

The structure is 40 ft (12.2 m) long with a longest span of 39 ft (11.9 m) and a deck 24 ft wide.

Who owns Hooper Lane over Big Springs?

It is owned by the County Highway Agency.