US Bridges

STC5711;ST Joe Rvr over ST Joe River

Fair

Shoshone County, Idaho · 0.75 E. 0.25 S. Marble CR · Structure no. 000000000020366

Built
1990
35 years old
Condition
Fair
inspected August 2021
Type
Stringer/Multi-beam or Girder
Steel
Length
420 ft
3 main spans
Daily traffic
370
2023 count
Owner
County
County Highway Agency

About this bridge

STC5711;ST Joe Rvr over ST Joe River is a steel stringer/multi-beam or girder carrying STC5711;ST Joe Rvr over ST Joe River in Shoshone County, Idaho. It was built in 1990, so it is 35 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 370 vehicles a day, roughly 3% of them trucks, projected to reach 555 by 2042. The structure is 420 ft (128 m) long and 31 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesSTC5711;ST Joe Rvr
CrossesST Joe River
Location0.75 E. 0.25 S. Marble CR
RouteCounty Highway 5711
CountyShoshone County
StateIdaho
Coordinates47.24939, -116.01356
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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating69 US tons
Inventory rating41 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length420 ft (128 m)
Longest span166 ft (50.6 m)
Deck width31 ft (9.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic370 (2023)
Projected traffic555 by 2042
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 STC5711;ST Joe Rvr over ST Joe River built?

It was built in 1990, making it 35 years old in 2025.

What condition is STC5711;ST Joe Rvr over ST Joe River 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 August 2021.

How much traffic does STC5711;ST Joe Rvr over ST Joe River carry?

About 370 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is STC5711;ST Joe Rvr over ST Joe River?

The structure is 420 ft (128 m) long with a longest span of 166 ft (50.6 m) and a deck 31 ft wide.

Who owns STC5711;ST Joe Rvr over ST Joe River?

It is owned by the County Highway Agency.