US Bridges

I 15 Nbl over Beaver Creek

Fair

Jefferson County, Idaho · 5.0 N. Hamer · Structure no. 000000000011900

Built
1963
62 years old
Condition
Fair
inspected November 2021
Type
Tee Beam
Concrete
Length
39 ft
1 main span
Daily traffic
1,700
2023 count
Owner
State
State Highway Agency

About this bridge

I 15 Nbl over Beaver Creek is a concrete tee beam carrying I 15 Nbl over Beaver Creek in Jefferson County, Idaho. It was built in 1963, so it is 62 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 1,700 vehicles a day, roughly 41% of them trucks, projected to reach 2,550 by 2042. The structure is 39 ft (11.9 m) long and 46 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI 15 Nbl
CrossesBeaver Creek
Location5.0 N. Hamer
RouteInterstate 15
StateIdaho
Coordinates43.99487, -112.23109
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59 US tons
Inventory rating35.1 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length39 ft (11.9 m)
Longest span38 ft (11.6 m)
Deck width46 ft (14 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,700 (2023)
Projected traffic2,550 by 2042
Trucks41%
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was I 15 Nbl over Beaver Creek built?

It was built in 1963, making it 62 years old in 2025.

What condition is I 15 Nbl over Beaver Creek 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 November 2021.

How much traffic does I 15 Nbl over Beaver Creek carry?

About 1,700 vehicles per day (2023 count), of which roughly 41% are trucks.

How long is I 15 Nbl over Beaver Creek?

The structure is 39 ft (11.9 m) long with a longest span of 38 ft (11.6 m) and a deck 46 ft wide.

Who owns I 15 Nbl over Beaver Creek?

It is owned by the State Highway Agency.