US Bridges

I 15 over Beaver Creek

Fair

Clark County, Idaho · 3.0 N. Spencer · Structure no. 000000000011960

Built
1969
56 years old
Condition
Fair
inspected August 2023
Type
Frame
Concrete
Length
34 ft
1 main span
Daily traffic
3,500
2023 count
Owner
State
State Highway Agency

About this bridge

I 15 over Beaver Creek is a concrete frame carrying I 15 over Beaver Creek in Clark County, Idaho. It was built in 1969, so it is 56 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 3,500 vehicles a day, roughly 52% of them trucks, projected to reach 5,250 by 2042. The structure is 34 ft (10.4 m) long and 202 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI 15
CrossesBeaver Creek
Location3.0 N. Spencer
RouteInterstate 15
StateIdaho
Coordinates44.39828, -112.1935
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
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 inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating61 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length34 ft (10.4 m)
Longest span34 ft (10.4 m)
Deck width202 ft (61.6 m)
Roadway width199 ft (60.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,500 (2023)
Projected traffic5,250 by 2042
Trucks52%
Lanes on structure4
Traffic directionTwo-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 over Beaver Creek built?

It was built in 1969, making it 56 years old in 2025.

What condition is I 15 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 August 2023.

How much traffic does I 15 over Beaver Creek carry?

About 3,500 vehicles per day (2023 count), of which roughly 52% are trucks.

How long is I 15 over Beaver Creek?

The structure is 34 ft (10.4 m) long with a longest span of 34 ft (10.4 m) and a deck 202 ft wide.

Who owns I 15 over Beaver Creek?

It is owned by the State Highway Agency.