US Bridges

Stc 6768;4700 East over Dry Bed Canal

Fair

Jefferson County, Idaho · 0.5 E. 1.9 N. Ririe · Structure no. 000000000020955

Built
1965
60 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
93 ft
1 main span
Daily traffic
1,600
2023 count
Owner
County
County Highway Agency

About this bridge

Stc 6768;4700 East over Dry Bed Canal is a prestressed concrete stringer/multi-beam or girder carrying Stc 6768;4700 East over Dry Bed Canal in Jefferson County, Idaho. It was built in 1965, so it is 60 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 1,600 vehicles a day, roughly 24% of them trucks, projected to reach 2,400 by 2042. The structure is 93 ft (28.3 m) long and 30 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesStc 6768;4700 East
CrossesDry Bed Canal
Location0.5 E. 1.9 N. Ririe
RouteCounty Highway 6768
CountyJefferson County
StateIdaho
Coordinates43.65431, -111.76533
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52 US tons
Inventory rating31 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length93 ft (28.3 m)
Longest span91 ft (27.7 m)
Deck width30 ft (9.2 m)
Roadway width28 ft (8.6 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 closed3.7 mi (6 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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$248,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Stc 6768;4700 East over Dry Bed Canal built?

It was built in 1965, making it 60 years old in 2025.

What condition is Stc 6768;4700 East over Dry Bed Canal 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 2024.

How much traffic does Stc 6768;4700 East over Dry Bed Canal carry?

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

How long is Stc 6768;4700 East over Dry Bed Canal?

The structure is 93 ft (28.3 m) long with a longest span of 91 ft (27.7 m) and a deck 30 ft wide.

Who owns Stc 6768;4700 East over Dry Bed Canal?

It is owned by the County Highway Agency.