US Bridges

STC7853;N.ILLINOIS over Notus Canal

Fair

Canyon County, Idaho · In Caldwell;n.Illinois Av · Structure no. 000000000021780

Built
1977
48 years old
Condition
Fair
inspected February 2024
Type
Frame
Concrete
Length
26 ft
1 main span
Daily traffic
3,800
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

STC7853;N.ILLINOIS over Notus Canal is a concrete frame carrying STC7853;N.ILLINOIS over Notus Canal in Canyon County, Idaho. It was built in 1977, so it is 48 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 3,800 vehicles a day, roughly 4% of them trucks, projected to reach 5,700 by 2042. The structure is 26 ft (7.9 m) long and 40 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSTC7853;N.ILLINOIS
CrossesNotus Canal
LocationIn Caldwell;n.Illinois Av
RouteCity Street 7853
CountyCanyon County
StateIdaho
Coordinates43.68278, -116.67825
Functional classUrban 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 protection8 Very GoodNo problems noted.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being 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 rating38 US tons
Inventory rating23 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length26 ft (7.9 m)
Longest span26 ft (7.9 m)
Deck width40 ft (12.2 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,800 (2023)
Projected traffic5,700 by 2042
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$660,000 (2018 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was STC7853;N.ILLINOIS over Notus Canal built?

It was built in 1977, making it 48 years old in 2025.

What condition is STC7853;N.ILLINOIS over Notus 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 February 2024.

How much traffic does STC7853;N.ILLINOIS over Notus Canal carry?

About 3,800 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is STC7853;N.ILLINOIS over Notus Canal?

The structure is 26 ft (7.9 m) long with a longest span of 26 ft (7.9 m) and a deck 40 ft wide.

Who owns STC7853;N.ILLINOIS over Notus Canal?

It is owned by the City or Municipal Highway Agency.