US Bridges

STC5731;ST Joe Rvr over Quartz Creek

Fair

Shoshone County, Idaho · 3.5 S. 13.3 E. Avery · Structure no. 000000000030999

Built
1992
33 years old
Condition
Fair
inspected September 2021
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
35 ft
1 main span
Daily traffic
310
2023 count
Owner
County
County Highway Agency

About this bridge

STC5731;ST Joe Rvr over Quartz Creek is a prestressed concrete stringer/multi-beam or girder carrying STC5731;ST Joe Rvr over Quartz Creek in Shoshone County, Idaho. It was built in 1992, so it is 33 years old, younger than the Idaho average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 310 vehicles a day, roughly 24% of them trucks, projected to reach 465 by 2042. The structure is 35 ft (10.7 m) long and 33 ft wide. If it were closed, the detour would be 31.1 mi (50 km).

Location

Open in Google Maps
CarriesSTC5731;ST Joe Rvr
CrossesQuartz Creek
Location3.5 S. 13.3 E. Avery
RouteCounty Highway 5731
CountyShoshone County
StateIdaho
Coordinates47.20161, -115.51728
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating79 US tons
Inventory rating47.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckNot applicable
Main spans1
Design loadHS 25 or greater
Structure length35 ft (10.7 m)
Longest span33 ft (10.1 m)
Deck width33 ft (10.2 m)
Roadway width32 ft (9.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic310 (2023)
Projected traffic465 by 2042
Trucks24%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed31.1 mi (50 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 STC5731;ST Joe Rvr over Quartz Creek built?

It was built in 1992, making it 33 years old in 2025.

What condition is STC5731;ST Joe Rvr over Quartz Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in September 2021.

How much traffic does STC5731;ST Joe Rvr over Quartz Creek carry?

About 310 vehicles per day (2023 count), of which roughly 24% are trucks.

How long is STC5731;ST Joe Rvr over Quartz Creek?

The structure is 35 ft (10.7 m) long with a longest span of 33 ft (10.1 m) and a deck 33 ft wide.

Who owns STC5731;ST Joe Rvr over Quartz Creek?

It is owned by the County Highway Agency.