US Bridges

I 15 Nbl over Aberdeen Springfield Cnl

Fair

Bingham County, Idaho · 5.8 N. Blackfoot · Structure no. 000000000011550

Built
1962
63 years old
Condition
Fair
inspected February 2025
Type
Stringer/Multi-beam or Girder
Concrete
Length
120 ft
3 main spans
Daily traffic
14,250
2023 count
Owner
State
State Highway Agency

About this bridge

I 15 Nbl over Aberdeen Springfield Cnl is a concrete stringer/multi-beam or girder carrying I 15 Nbl over Aberdeen Springfield Cnl in Bingham County, Idaho. It was built in 1962, so it is 63 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 5 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 14,250 vehicles a day, roughly 16% of them trucks, projected to reach 21,375 by 2042. The structure is 120 ft (36.6 m) long and 40 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI 15 Nbl
CrossesAberdeen Springfield Cnl
Location5.8 N. Blackfoot
RouteInterstate 15
CountyBingham County
StateIdaho
Coordinates43.26942, -112.30264
Functional classRural Principal Arterial - Interstate

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.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67 US tons
Inventory rating40 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length120 ft (36.6 m)
Longest span39 ft (11.9 m)
Deck width40 ft (12.3 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,250 (2023)
Projected traffic21,375 by 2042
Trucks16%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.6 million (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was I 15 Nbl over Aberdeen Springfield Cnl built?

It was built in 1962, making it 63 years old in 2025.

What condition is I 15 Nbl over Aberdeen Springfield Cnl 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 February 2025.

How much traffic does I 15 Nbl over Aberdeen Springfield Cnl carry?

About 14,250 vehicles per day (2023 count), of which roughly 16% are trucks.

How long is I 15 Nbl over Aberdeen Springfield Cnl?

The structure is 120 ft (36.6 m) long with a longest span of 39 ft (11.9 m) and a deck 40 ft wide.

Who owns I 15 Nbl over Aberdeen Springfield Cnl?

It is owned by the State Highway Agency.