US Bridges

Old HWY 28;BACK RD over Kenny Creek

Good

Lemhi County, Idaho · 4.6 N. 0.5 W. Tendoy · Structure no. 000000000034675

Built
2012
13 years old
Condition
Good
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
29 ft
1 main span
Daily traffic
50
2023 count
Owner
County
County Highway Agency

About this bridge

Old HWY 28;BACK RD over Kenny Creek is a steel stringer/multi-beam or girder carrying Old HWY 28;BACK RD over Kenny Creek in Lemhi 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 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 25% of them trucks, projected to reach 75 by 2042. The structure is 29 ft (8.8 m) long and 29 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesOld HWY 28;BACK RD
CrossesKenny Creek
Location4.6 N. 0.5 W. Tendoy
RouteCounty Highway 0
StateIdaho
Coordinates45.02722, -113.654
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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74 US tons
Inventory rating57.1 US tons

Structure

MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHL 93
Structure length29 ft (8.8 m)
Longest span28 ft (8.5 m)
Deck width29 ft (8.8 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2023)
Projected traffic75 by 2042
Trucks25%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 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 Old HWY 28;BACK RD over Kenny Creek built?

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

What condition is Old HWY 28;BACK RD over Kenny Creek 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 2023.

How much traffic does Old HWY 28;BACK RD over Kenny Creek carry?

About 50 vehicles per day (2023 count), of which roughly 25% are trucks.

How long is Old HWY 28;BACK RD over Kenny Creek?

The structure is 29 ft (8.8 m) long with a longest span of 28 ft (8.5 m) and a deck 29 ft wide.

Who owns Old HWY 28;BACK RD over Kenny Creek?

It is owned by the County Highway Agency.