US Bridges

SH 34 over Tincup Creek

Good

Caribou County, Idaho · 12.6 E. Wayan · Structure no. 000000000034550

Built
2018
7 years old
Condition
Good
inspected August 2022
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
64 ft
1 main span
Daily traffic
770
2023 count
Owner
State
State Highway Agency

About this bridge

SH 34 over Tincup Creek is a prestressed concrete box beam or girders - multiple carrying SH 34 over Tincup Creek in Caribou County, Idaho. It was built in 2018, so it is 7 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 770 vehicles a day, roughly 26% of them trucks, projected to reach 1,155 by 2042. The structure is 64 ft (19.5 m) long and 40 ft wide. If it were closed, the detour would be 54.1 mi (87 km).

Location

Open in Google Maps
CarriesSH 34
CrossesTincup Creek
Location12.6 E. Wayan
RouteState Highway 34
CountyCaribou County
StateIdaho
Coordinates42.98039, -111.16644
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 inspectionAugust 2022
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 rating67.9 US tons
Inventory rating52.5 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length64 ft (19.5 m)
Longest span60 ft (18.4 m)
Deck width40 ft (12.2 m)
Roadway width37 ft (11.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic770 (2023)
Projected traffic1,155 by 2042
Trucks26%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed54.1 mi (87 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 34 over Tincup Creek built?

It was built in 2018, making it 7 years old in 2025.

What condition is SH 34 over Tincup 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 August 2022.

How much traffic does SH 34 over Tincup Creek carry?

About 770 vehicles per day (2023 count), of which roughly 26% are trucks.

How long is SH 34 over Tincup Creek?

The structure is 64 ft (19.5 m) long with a longest span of 60 ft (18.4 m) and a deck 40 ft wide.

Who owns SH 34 over Tincup Creek?

It is owned by the State Highway Agency.