US Bridges

STC6724; W 65th S over Sidehill Canal

Fair

Bonneville County, Idaho · 0.6 S. 5.4 W. Idaho Falls · Structure no. 000000000020845

Built
1957
68 years old
Condition
Fair
inspected March 2023
Type
Frame
Concrete
Length
26 ft
1 main span
Daily traffic
110
2023 count
Owner
County
County Highway Agency

About this bridge

STC6724; W 65th S over Sidehill Canal is a concrete frame carrying STC6724; W 65th S over Sidehill Canal in Bonneville County, Idaho. It was built in 1957, so it is 68 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 110 vehicles a day, roughly 22% of them trucks, projected to reach 165 by 2042. The structure is 26 ft (7.8 m) long and 31 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesSTC6724; W 65th S
CrossesSidehill Canal
Location0.6 S. 5.4 W. Idaho Falls
RouteCounty Highway 6724
CountyBonneville County
StateIdaho
Coordinates43.43964, -112.1485
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 protection7 GoodSome minor problems.
Last inspectionMarch 2023
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating45 US tons
Inventory rating27 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length26 ft (7.8 m)
Longest span26 ft (7.8 m)
Deck width31 ft (9.3 m)
Roadway width28 ft (8.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic110 (2023)
Projected traffic165 by 2042
Trucks22%
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 STC6724; W 65th S over Sidehill Canal built?

It was built in 1957, making it 68 years old in 2025.

What condition is STC6724; W 65th S over Sidehill 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 2023.

How much traffic does STC6724; W 65th S over Sidehill Canal carry?

About 110 vehicles per day (2023 count), of which roughly 22% are trucks.

How long is STC6724; W 65th S over Sidehill Canal?

The structure is 26 ft (7.8 m) long with a longest span of 26 ft (7.8 m) and a deck 31 ft wide.

Who owns STC6724; W 65th S over Sidehill Canal?

It is owned by the County Highway Agency.