US Bridges

I 15B;JENSEN Road over I 15 Sb-Nb;mccammon Ic

Fair

Bannock County, Idaho · 4.6 S. Mccammon · Structure no. 000000000012005

Built
1964
61 years old
Condition
Fair
inspected July 2021
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
225 ft
3 main spans
Daily traffic
740
2023 count
Owner
State
State Highway Agency

About this bridge

I 15B;JENSEN Road over I 15 Sb-Nb;mccammon Ic is a prestressed concrete stringer/multi-beam or girder carrying I 15B;JENSEN Road over I 15 Sb-Nb;mccammon Ic in Bannock County, Idaho. It was built in 1964, so it is 61 years old, older than the Idaho average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 740 vehicles a day, roughly 6% of them trucks, projected to reach 1,110 by 2042. The structure is 225 ft (68.6 m) long and 33 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesI 15B;JENSEN Road
CrossesI 15 Sb-Nb;mccammon Ic
Location4.6 S. Mccammon
RouteInterstate 15
CountyBannock County
StateIdaho
Coordinates42.61722, -112.19944
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72 US tons
Inventory rating42 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3 (+2 approach)
Design loadHS 20
Structure length225 ft (68.6 m)
Longest span50 ft (15.2 m)
Deck width33 ft (10 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic740 (2023)
Projected traffic1,110 by 2042
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemNo
Strategic Highway NetworkInterstate STRAHNET route

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;JENSEN Road over I 15 Sb-Nb;mccammon Ic built?

It was built in 1964, making it 61 years old in 2025.

What condition is I 15B;JENSEN Road over I 15 Sb-Nb;mccammon Ic in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in July 2021.

How much traffic does I 15B;JENSEN Road over I 15 Sb-Nb;mccammon Ic carry?

About 740 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is I 15B;JENSEN Road over I 15 Sb-Nb;mccammon Ic?

The structure is 225 ft (68.6 m) long with a longest span of 50 ft (15.2 m) and a deck 33 ft wide.

Who owns I 15B;JENSEN Road over I 15 Sb-Nb;mccammon Ic?

It is owned by the State Highway Agency.