US Bridges

Frozen Dog Road over Black Canyon Canal

Fair

Gem County, Idaho · 1.2 N. 3.1 E. Emmett · Structure no. 000000000028070

Built
1977
48 years old
Condition
Fair
inspected October 2023
Type
Tee Beam
Prestressed Concrete
Length
65 ft
1 main span
Daily traffic
150
2023 count
Owner
County
County Highway Agency

About this bridge

Frozen Dog Road over Black Canyon Canal is a prestressed concrete tee beam carrying Frozen Dog Road over Black Canyon Canal in Gem County, Idaho. It was built in 1977, so it is 48 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 150 vehicles a day, roughly 10% of them trucks, projected to reach 225 by 2039. The structure is 65 ft (19.8 m) long and 28 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesFrozen Dog Road
CrossesBlack Canyon Canal
Location1.2 N. 3.1 E. Emmett
RouteCounty Highway 0
CountyGem County
StateIdaho
Coordinates43.89375, -116.4365
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
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 inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating32.7 US tons
Inventory rating22.8 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length65 ft (19.8 m)
Longest span63 ft (19.2 m)
Deck width28 ft (8.5 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (2023)
Projected traffic225 by 2039
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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$611,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Frozen Dog Road over Black Canyon Canal built?

It was built in 1977, making it 48 years old in 2025.

What condition is Frozen Dog Road over Black Canyon Canal 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 October 2023.

How much traffic does Frozen Dog Road over Black Canyon Canal carry?

About 150 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Frozen Dog Road over Black Canyon Canal?

The structure is 65 ft (19.8 m) long with a longest span of 63 ft (19.2 m) and a deck 28 ft wide.

Who owns Frozen Dog Road over Black Canyon Canal?

It is owned by the County Highway Agency.