US Bridges

Stc 6768;S 600 E over S. Fork Snake River

Fair

Madison County, Idaho · 0.6 E. 3.5 N. Ririe · Structure no. 000000000020966

Built
1999
26 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
163 ft
2 main spans
Daily traffic
1,600
2023 count
Owner
County
County Highway Agency

About this bridge

Stc 6768;S 600 E over S. Fork Snake River is a prestressed concrete stringer/multi-beam or girder carrying Stc 6768;S 600 E over S. Fork Snake River in Madison County, Idaho. It was built in 1999, so it is 26 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 5 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 1,600 vehicles a day, roughly 24% of them trucks, projected to reach 2,400 by 2042. The structure is 163 ft (49.7 m) long and 33 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesStc 6768;S 600 E
CrossesS. Fork Snake River
Location0.6 E. 3.5 N. Ririe
RouteCounty Highway 6768
CountyMadison County
StateIdaho
Coordinates43.67778, -111.7655
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110 US tons
Inventory rating59 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length163 ft (49.7 m)
Longest span80 ft (24.4 m)
Deck width33 ft (10 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,600 (2023)
Projected traffic2,400 by 2042
Trucks24%
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 Stc 6768;S 600 E over S. Fork Snake River built?

It was built in 1999, making it 26 years old in 2025.

What condition is Stc 6768;S 600 E over S. Fork Snake 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 October 2023.

How much traffic does Stc 6768;S 600 E over S. Fork Snake River carry?

About 1,600 vehicles per day (2023 count), of which roughly 24% are trucks.

How long is Stc 6768;S 600 E over S. Fork Snake River?

The structure is 163 ft (49.7 m) long with a longest span of 80 ft (24.4 m) and a deck 33 ft wide.

Who owns Stc 6768;S 600 E over S. Fork Snake River?

It is owned by the County Highway Agency.