US Bridges

Kelly Toponce RD over Chesterfield Canal

Good

Caribou County, Idaho · 1.0 S 5.3 W Chesterfield · Structure no. 000000000023286

Built
2002
23 years old
Condition
Good
inspected April 2021
Type
Frame
Concrete
Length
28 ft
1 main span
Daily traffic
50
2023 count
Owner
County
County Highway Agency

About this bridge

Kelly Toponce RD over Chesterfield Canal is a concrete frame carrying Kelly Toponce RD over Chesterfield Canal in Caribou County, Idaho. It was built in 2002, so it is 23 years old, younger than the Idaho average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 50 vehicles a day, roughly 5% of them trucks, projected to reach 75 by 2039. The structure is 28 ft (8.5 m) long and 28 ft wide. If it were closed, the detour would be 16.8 mi (27 km).

Location

Open in Google Maps
CarriesKelly Toponce RD
CrossesChesterfield Canal
Location1.0 S 5.3 W Chesterfield
RouteCounty Highway 0
CountyCaribou County
StateIdaho
Coordinates42.85083, -112.00278
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating71 US tons
Inventory rating43 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHS 25 or greater
Structure length28 ft (8.5 m)
Longest span28 ft (8.5 m)
Deck width28 ft (8.5 m)
Roadway width25 ft (7.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2023)
Projected traffic75 by 2039
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.8 mi (27 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Kelly Toponce RD over Chesterfield Canal built?

It was built in 2002, making it 23 years old in 2025.

What condition is Kelly Toponce RD over Chesterfield Canal in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in April 2021.

How much traffic does Kelly Toponce RD over Chesterfield Canal carry?

About 50 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Kelly Toponce RD over Chesterfield Canal?

The structure is 28 ft (8.5 m) long with a longest span of 28 ft (8.5 m) and a deck 28 ft wide.

Who owns Kelly Toponce RD over Chesterfield Canal?

It is owned by the County Highway Agency.