US Bridges

I 15B;SUNNYSIDE RD over I 15;SUNNYSIDE RD Ic

Good

Bonneville County, Idaho · 1.1 W. Idaho Falls · Structure no. 000000000021614

Built
2007
18 years old
Condition
Good
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
327 ft
2 main spans
Daily traffic
11,000
2023 count
Owner
State
State Highway Agency

About this bridge

I 15B;SUNNYSIDE RD over I 15;SUNNYSIDE RD Ic is a steel continuous stringer/multi-beam or girder carrying I 15B;SUNNYSIDE RD over I 15;SUNNYSIDE RD Ic 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 11,000 vehicles a day, roughly 5% of them trucks, projected to reach 16,500 by 2042. The structure is 327 ft (99.7 m) long and 95 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesI 15B;SUNNYSIDE RD
CrossesI 15;SUNNYSIDE RD Ic
Location1.1 W. Idaho Falls
RouteInterstate 15
CountyBonneville County
StateIdaho
Coordinates43.46783, -112.08639
Functional classUrban Other Principal 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.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating83 US tons
Inventory rating50 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHL 93
Structure length327 ft (99.7 m)
Longest span160 ft (48.8 m)
Deck width95 ft (29 m)
Roadway width84 ft (25.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,000 (2023)
Projected traffic16,500 by 2042
Trucks5%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 15B;SUNNYSIDE RD over I 15;SUNNYSIDE RD Ic built?

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

What condition is I 15B;SUNNYSIDE RD over I 15;SUNNYSIDE RD Ic 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 September 2024.

How much traffic does I 15B;SUNNYSIDE RD over I 15;SUNNYSIDE RD Ic carry?

About 11,000 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is I 15B;SUNNYSIDE RD over I 15;SUNNYSIDE RD Ic?

The structure is 327 ft (99.7 m) long with a longest span of 160 ft (48.8 m) and a deck 95 ft wide.

Who owns I 15B;SUNNYSIDE RD over I 15;SUNNYSIDE RD Ic?

It is owned by the State Highway Agency.