US Bridges

I 15B;MERRILL Road over I 15;N. Mccammon Ic

Good

Bannock County, Idaho · 1.5 N. Mccammon · Structure no. 000000000012026

Built
2012
13 years old
Condition
Good
inspected July 2022
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
272 ft
2 main spans
Daily traffic
5,300
2023 count
Owner
State
State Highway Agency

About this bridge

I 15B;MERRILL Road over I 15;N. Mccammon Ic is a steel continuous stringer/multi-beam or girder carrying I 15B;MERRILL Road over I 15;N. Mccammon Ic in Bannock County, Idaho. It was built in 2012, so it is 13 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 5,300 vehicles a day, roughly 13% of them trucks, projected to reach 7,950 by 2042. The structure is 272 ft (82.9 m) long and 64 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesI 15B;MERRILL Road
CrossesI 15;N. Mccammon Ic
Location1.5 N. Mccammon
RouteInterstate 15
CountyBannock County
StateIdaho
Coordinates42.661, -112.21222
Functional classRural Principal Arterial - Other

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 inspectionJuly 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating110.1 US tons
Inventory rating60 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHL 93
Structure length272 ft (82.9 m)
Longest span135 ft (41.1 m)
Deck width64 ft (19.5 m)
Roadway width61 ft (18.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,300 (2023)
Projected traffic7,950 by 2042
Trucks13%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed6.2 mi (10 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;MERRILL Road over I 15;N. Mccammon Ic built?

It was built in 2012, making it 13 years old in 2025.

What condition is I 15B;MERRILL Road over I 15;N. Mccammon 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 July 2022.

How much traffic does I 15B;MERRILL Road over I 15;N. Mccammon Ic carry?

About 5,300 vehicles per day (2023 count), of which roughly 13% are trucks.

How long is I 15B;MERRILL Road over I 15;N. Mccammon Ic?

The structure is 272 ft (82.9 m) long with a longest span of 135 ft (41.1 m) and a deck 64 ft wide.

Who owns I 15B;MERRILL Road over I 15;N. Mccammon Ic?

It is owned by the State Highway Agency.