US Bridges

Stc 6699;W 17th N over East Lateral Canal

Fair

Bonneville County, Idaho · 0.3 W. Idaho Falls · Structure no. 000000000031010

Built
1956
69 years old
Condition
Fair
inspected November 2023
Type
Frame
Concrete
Length
23 ft
1 main span
Daily traffic
680
2023 count
Owner
County
County Highway Agency

About this bridge

Stc 6699;W 17th N over East Lateral Canal is a concrete frame carrying Stc 6699;W 17th N over East Lateral Canal in Bonneville County, Idaho. It was built in 1956, so it is 69 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 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 680 vehicles a day, roughly 1% of them trucks, projected to reach 1,020 by 2042. The structure is 23 ft (7 m) long and 29 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesStc 6699;W 17th N
CrossesEast Lateral Canal
Location0.3 W. Idaho Falls
RouteCounty Highway 6699
CountyBonneville County
StateIdaho
Coordinates43.51111, -112.084
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating30 US tons
Inventory rating18 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 15
Structure length23 ft (7 m)
Longest span23 ft (7 m)
Deck width29 ft (8.7 m)
Roadway width26 ft (7.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic680 (2023)
Projected traffic1,020 by 2042
Trucks1%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$419,000 (2017 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Stc 6699;W 17th N over East Lateral Canal built?

It was built in 1956, making it 69 years old in 2025.

What condition is Stc 6699;W 17th N over East Lateral 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 November 2023.

How much traffic does Stc 6699;W 17th N over East Lateral Canal carry?

About 680 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is Stc 6699;W 17th N over East Lateral Canal?

The structure is 23 ft (7 m) long with a longest span of 23 ft (7 m) and a deck 29 ft wide.

Who owns Stc 6699;W 17th N over East Lateral Canal?

It is owned by the County Highway Agency.