US Bridges

Stc 5756;BIG CR RD over Big Creek;sunshine Mine

Good

Shoshone County, Idaho · 6.3 E. Kellogg · Structure no. 000000000020550

Built
1977
48 years old
Condition
Good
inspected October 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
70 ft
1 main span
Daily traffic
60
2023 count
Owner
County
County Highway Agency

About this bridge

Stc 5756;BIG CR RD over Big Creek;sunshine Mine is a prestressed concrete stringer/multi-beam or girder carrying Stc 5756;BIG CR RD over Big Creek;sunshine Mine in Shoshone County, Idaho. It was built in 1977, so it is 48 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 60 vehicles a day, roughly 99% of them trucks, projected to reach 90 by 2042. The structure is 70 ft (21.3 m) long and 32 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesStc 5756;BIG CR RD
CrossesBig Creek;sunshine Mine
Location6.3 E. Kellogg
RouteCounty Highway 5756
CountyShoshone County
StateIdaho
Coordinates47.50017, -116.07168
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
Deck7 GoodSome minor problems.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 rating66 US tons
Inventory rating33 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length70 ft (21.3 m)
Longest span67 ft (20.4 m)
Deck width32 ft (9.7 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic60 (2023)
Projected traffic90 by 2042
Trucks99%
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

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 Stc 5756;BIG CR RD over Big Creek;sunshine Mine built?

It was built in 1977, making it 48 years old in 2025.

What condition is Stc 5756;BIG CR RD over Big Creek;sunshine Mine 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 October 2024.

How much traffic does Stc 5756;BIG CR RD over Big Creek;sunshine Mine carry?

About 60 vehicles per day (2023 count), of which roughly 99% are trucks.

How long is Stc 5756;BIG CR RD over Big Creek;sunshine Mine?

The structure is 70 ft (21.3 m) long with a longest span of 67 ft (20.4 m) and a deck 32 ft wide.

Who owns Stc 5756;BIG CR RD over Big Creek;sunshine Mine?

It is owned by the County Highway Agency.