US Bridges

I 86 & Ramps over Lanes Gulch

Fair

Power County, Idaho · 17.9 W. American Falls · Structure no. 000000000010675

Built
1981
44 years old
Condition
Fair
inspected March 2024
Type
Culvert
Concrete Continuous
Length
29 ft
2 main spans
Daily traffic
8,300
2023 count
Owner
State
State Highway Agency

About this bridge

I 86 & Ramps over Lanes Gulch is a concrete continuous culvert carrying I 86 & Ramps over Lanes Gulch in Power County, Idaho. It was built in 1981, so it is 44 years old, younger 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 8,300 vehicles a day, roughly 34% of them trucks, projected to reach 12,450 by 2042. The structure is 29 ft (8.8 m) long and 280 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesI 86 & Ramps
CrossesLanes Gulch
Location17.9 W. American Falls
RouteInterstate 86
CountyPower County
StateIdaho
Coordinates42.62158, -113.11753
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
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
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 rating110.1 US tons
Inventory rating87 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length29 ft (8.8 m)
Longest span14 ft (4.2 m)
Deck width280 ft (85.3 m)
Roadway width278 ft (84.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,300 (2023)
Projected traffic12,450 by 2042
Trucks34%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 86 & Ramps over Lanes Gulch built?

It was built in 1981, making it 44 years old in 2025.

What condition is I 86 & Ramps over Lanes Gulch 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 March 2024.

How much traffic does I 86 & Ramps over Lanes Gulch carry?

About 8,300 vehicles per day (2023 count), of which roughly 34% are trucks.

How long is I 86 & Ramps over Lanes Gulch?

The structure is 29 ft (8.8 m) long with a longest span of 14 ft (4.2 m) and a deck 280 ft wide.

Who owns I 86 & Ramps over Lanes Gulch?

It is owned by the State Highway Agency.