US Bridges

SH 39 over Lateral a Canal

Good

Bingham County, Idaho · 2.75 SW Rockford · Structure no. 000000000014201

Built
2019
6 years old
Condition
Good
inspected February 2025
Type
Frame
Concrete
Length
23 ft
1 main span
Daily traffic
2,700
2023 count
Owner
State
State Highway Agency

About this bridge

SH 39 over Lateral a Canal is a concrete frame carrying SH 39 over Lateral a Canal in Bingham County, Idaho. It was built in 2019, so it is 6 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 2,700 vehicles a day, roughly 23% of them trucks, projected to reach 4,050 by 2042. The structure is 23 ft (7 m) long and 66 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesSH 39
CrossesLateral a Canal
Location2.75 SW Rockford
RouteState Highway 39
StateIdaho
Coordinates43.15861, -112.56617
Functional classRural Minor Arterial

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 inspectionFebruary 2025
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 adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating85 US tons
Inventory rating65.4 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length23 ft (7 m)
Longest span23 ft (7 m)
Deck width66 ft (20.1 m)
Roadway width64 ft (19.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,700 (2023)
Projected traffic4,050 by 2042
Trucks23%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 SH 39 over Lateral a Canal built?

It was built in 2019, making it 6 years old in 2025.

What condition is SH 39 over Lateral a Canal 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 February 2025.

How much traffic does SH 39 over Lateral a Canal carry?

About 2,700 vehicles per day (2023 count), of which roughly 23% are trucks.

How long is SH 39 over Lateral a Canal?

The structure is 23 ft (7 m) long with a longest span of 23 ft (7 m) and a deck 66 ft wide.

Who owns SH 39 over Lateral a Canal?

It is owned by the State Highway Agency.