US Bridges

SH 4 over Canyon Creek;tamarack Br

Good

Shoshone County, Idaho · 1.5 S. Burke · Structure no. 000000000010161

Built
2004
21 years old
Condition
Good
inspected September 2024
Type
Frame
Concrete
Length
29 ft
1 main span
Daily traffic
190
2023 count
Owner
State
State Highway Agency

About this bridge

SH 4 over Canyon Creek;tamarack Br is a concrete frame carrying SH 4 over Canyon Creek;tamarack Br in Shoshone County, Idaho. It was built in 2004, so it is 21 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 8 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 29 ft (8.8 m) long and 41 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesSH 4
CrossesCanyon Creek;tamarack Br
Location1.5 S. Burke
RouteState Highway 4
StateIdaho
Coordinates47.51861, -115.84878
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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating89 US tons
Inventory rating53 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length29 ft (8.8 m)
Longest span29 ft (8.8 m)
Deck width41 ft (12.4 m)
Roadway width30 ft (9 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;tamarack Br built?

It was built in 2004, making it 21 years old in 2025.

What condition is SH 4 over Canyon Creek;tamarack Br 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;tamarack Br carry?

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

How long is SH 4 over Canyon Creek;tamarack Br?

The structure is 29 ft (8.8 m) long with a longest span of 29 ft (8.8 m) and a deck 41 ft wide.

Who owns SH 4 over Canyon Creek;tamarack Br?

It is owned by the State Highway Agency.