US Bridges

STC1821;SGR Fctory over Sand Creek

Fair

Bingham County, Idaho · 1.6 N. 3.2 E. Firth · Structure no. 000000000022760

Built
1981
44 years old
Condition
Fair
inspected March 2021
Type
Frame
Concrete
Length
46 ft
1 main span
Daily traffic
890
2023 count
Owner
County
County Highway Agency

About this bridge

STC1821;SGR Fctory over Sand Creek is a concrete frame carrying STC1821;SGR Fctory over Sand Creek in Bingham County, Idaho. It was built in 1981, so it is 44 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 890 vehicles a day, roughly 14% of them trucks, projected to reach 1,335 by 2042. The structure is 46 ft (14 m) long and 48 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesSTC1821;SGR Fctory
CrossesSand Creek
Location1.6 N. 3.2 E. Firth
RouteCounty Highway 1821
CountyBingham County
StateIdaho
Coordinates43.32673, -112.12025
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 protection8 Very GoodNo problems noted.
Last inspectionMarch 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating79 US tons
Inventory rating47 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length46 ft (14 m)
Longest span46 ft (14 m)
Deck width48 ft (14.6 m)
Roadway width45 ft (13.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic890 (2023)
Projected traffic1,335 by 2042
Trucks14%
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 STC1821;SGR Fctory over Sand Creek built?

It was built in 1981, making it 44 years old in 2025.

What condition is STC1821;SGR Fctory over Sand 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 March 2021.

How much traffic does STC1821;SGR Fctory over Sand Creek carry?

About 890 vehicles per day (2023 count), of which roughly 14% are trucks.

How long is STC1821;SGR Fctory over Sand Creek?

The structure is 46 ft (14 m) long with a longest span of 46 ft (14 m) and a deck 48 ft wide.

Who owns STC1821;SGR Fctory over Sand Creek?

It is owned by the County Highway Agency.