US Bridges

I 15B on Ramp over Sidehill Canal

Good

Bonneville County, Idaho · 1.2 W. Idaho Falls · Structure no. 000000000011692

Built
2007
18 years old
Condition
Good
inspected November 2024
Type
Frame
Concrete
Length
24 ft
1 main span
Daily traffic
4,300
2023 count
Owner
State
State Highway Agency

About this bridge

I 15B on Ramp over Sidehill Canal is a concrete frame carrying I 15B on Ramp over Sidehill Canal in Bonneville County, Idaho. It was built in 2007, so it is 18 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 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 4,300 vehicles a day, projected to reach 6,450 by 2042. The structure is 24 ft (7.3 m) long and 178 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI 15B on Ramp
CrossesSidehill Canal
Location1.2 W. Idaho Falls
RouteInterstate 15
CountyBonneville County
StateIdaho
Coordinates43.46684, -112.08757
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

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

ComponentRatingMeaning
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation9: Superior 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 rating110.1 US tons
Inventory rating101 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length24 ft (7.3 m)
Longest span24 ft (7.3 m)
Deck width178 ft (54.3 m)
Roadway width46 ft (14 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,300 (2023)
Projected traffic6,450 by 2042
Trucks0%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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 I 15B on Ramp over Sidehill Canal built?

It was built in 2007, making it 18 years old in 2025.

What condition is I 15B on Ramp over Sidehill 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 November 2024.

How much traffic does I 15B on Ramp over Sidehill Canal carry?

About 4,300 vehicles per day (2023 count).

How long is I 15B on Ramp over Sidehill Canal?

The structure is 24 ft (7.3 m) long with a longest span of 24 ft (7.3 m) and a deck 178 ft wide.

Who owns I 15B on Ramp over Sidehill Canal?

It is owned by the State Highway Agency.