US Bridges

Burton Road over Last Chance Canal

Fair

Caribou County, Idaho · 2.2 N. 1.2 E. Grace · Structure no. 000000000023233

Built
1983
42 years old
Condition
Fair
inspected April 2024
Type
Tee Beam
Prestressed Concrete
Length
32 ft
1 main span
Daily traffic
25
2023 count
Owner
County
County Highway Agency

About this bridge

Burton Road over Last Chance Canal is a prestressed concrete tee beam carrying Burton Road over Last Chance Canal in Caribou County, Idaho. It was built in 1983, so it is 42 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 25 vehicles a day, roughly 5% of them trucks, projected to reach 38 by 2039. The structure is 32 ft (9.8 m) long and 24 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesBurton Road
CrossesLast Chance Canal
Location2.2 N. 1.2 E. Grace
RouteCounty Highway 0
CountyCaribou County
StateIdaho
Coordinates42.60661, -111.70572
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating45 US tons
Inventory rating16 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length32 ft (9.8 m)
Longest span31 ft (9.4 m)
Deck width24 ft (7.3 m)
Roadway width21 ft (6.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2023)
Projected traffic38 by 2039
Trucks5%
Lanes on structure2
Traffic directionTwo-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$360,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Burton Road over Last Chance Canal built?

It was built in 1983, making it 42 years old in 2025.

What condition is Burton Road over Last Chance 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 April 2024.

How much traffic does Burton Road over Last Chance Canal carry?

About 25 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Burton Road over Last Chance Canal?

The structure is 32 ft (9.8 m) long with a longest span of 31 ft (9.4 m) and a deck 24 ft wide.

Who owns Burton Road over Last Chance Canal?

It is owned by the County Highway Agency.