US Bridges

SH 4 over Canyon Creek

Good

Shoshone County, Idaho · 0.5 S. Burke · Structure no. 000000000010170

Built
1976
49 years old
Condition
Good
inspected September 2024
Type
Frame
Concrete
Length
21 ft
1 main span
Daily traffic
190
2023 count
Owner
State
State Highway Agency

About this bridge

SH 4 over Canyon Creek is a concrete frame carrying SH 4 over Canyon Creek in Shoshone County, Idaho. It was built in 1976, so it is 49 years old, older 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 190 vehicles a day, roughly 27% of them trucks, projected to reach 285 by 2042. The structure is 21 ft (6.4 m) long and 38 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesSH 4
CrossesCanyon Creek
Location0.5 S. Burke
RouteState Highway 4
StateIdaho
Coordinates47.51922, -115.82883
Functional classRural Major Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67 US tons
Inventory rating40 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length21 ft (6.4 m)
Longest span21 ft (6.4 m)
Deck width38 ft (11.5 m)
Roadway width35 ft (10.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic190 (2023)
Projected traffic285 by 2042
Trucks27%
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

OwnerState Highway Agency
Maintained byState 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 SH 4 over Canyon Creek built?

It was built in 1976, making it 49 years old in 2025.

What condition is SH 4 over Canyon 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 September 2024.

How much traffic does SH 4 over Canyon Creek carry?

About 190 vehicles per day (2023 count), of which roughly 27% are trucks.

How long is SH 4 over Canyon Creek?

The structure is 21 ft (6.4 m) long with a longest span of 21 ft (6.4 m) and a deck 38 ft wide.

Who owns SH 4 over Canyon Creek?

It is owned by the State Highway Agency.