US Bridges

STC5711;ST Joe Rvr over Mica Creek

Fair

Shoshone County, Idaho · 3.0 E. Calder · Structure no. 000000000020360

Built
1973
52 years old
Condition
Fair
inspected August 2023
Type
Tee Beam
Concrete
Length
80 ft
3 main spans
Daily traffic
930
2023 count
Owner
County
County Highway Agency

About this bridge

STC5711;ST Joe Rvr over Mica Creek is a concrete tee beam carrying STC5711;ST Joe Rvr over Mica Creek in Shoshone County, Idaho. It was built in 1973, so it is 52 years old, older 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 930 vehicles a day, roughly 22% of them trucks, projected to reach 1,395 by 2042. The structure is 80 ft (24.4 m) long and 35 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesSTC5711;ST Joe Rvr
CrossesMica Creek
Location3.0 E. Calder
RouteCounty Highway 5711
CountyShoshone County
StateIdaho
Coordinates47.26708, -116.135
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.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating54 US tons
Inventory rating32 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length80 ft (24.4 m)
Longest span50 ft (15.2 m)
Deck width35 ft (10.8 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic930 (2023)
Projected traffic1,395 by 2042
Trucks22%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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 Mica Creek built?

It was built in 1973, making it 52 years old in 2025.

What condition is STC5711;ST Joe Rvr over Mica 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 August 2023.

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

About 930 vehicles per day (2023 count), of which roughly 22% are trucks.

How long is STC5711;ST Joe Rvr over Mica Creek?

The structure is 80 ft (24.4 m) long with a longest span of 50 ft (15.2 m) and a deck 35 ft wide.

Who owns STC5711;ST Joe Rvr over Mica Creek?

It is owned by the County Highway Agency.