US Bridges

Cooper Pass Road over Military Gulch

Fair

Shoshone County, Idaho · 0.5 N. 2.3 E. Burke · Structure no. 000000000037830

Built
2012
13 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
38 ft
1 main span
Daily traffic
220
2023 count
Owner
County
County Highway Agency

About this bridge

Cooper Pass Road over Military Gulch is a steel stringer/multi-beam or girder carrying Cooper Pass Road over Military Gulch in Shoshone County, Idaho. It was built in 2012, so it is 13 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 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 220 vehicles a day, roughly 22% of them trucks, projected to reach 330 by 2042. The structure is 38 ft (11.6 m) long and 12 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesCooper Pass Road
CrossesMilitary Gulch
Location0.5 N. 2.3 E. Burke
RouteCounty Highway 0
CountyShoshone County
StateIdaho
Coordinates47.52792, -115.76703
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating26 US tons
Inventory rating19 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans1
Design loadUnknown
Structure length38 ft (11.6 m)
Longest span30 ft (9.1 m)
Deck width12 ft (3.7 m)
Roadway width11 ft (3.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic220 (2023)
Projected traffic330 by 2042
Trucks22%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$520,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Cooper Pass Road over Military Gulch built?

It was built in 2012, making it 13 years old in 2025.

What condition is Cooper Pass Road over Military 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 July 2024.

How much traffic does Cooper Pass Road over Military Gulch carry?

About 220 vehicles per day (2023 count), of which roughly 22% are trucks.

How long is Cooper Pass Road over Military Gulch?

The structure is 38 ft (11.6 m) long with a longest span of 30 ft (9.1 m) and a deck 12 ft wide.

Who owns Cooper Pass Road over Military Gulch?

It is owned by the County Highway Agency.