US Bridges

1100 East Road over J Canal;se.Declo Br

Fair

Cassia County, Idaho · .3S 2.5E DECLO;110S-1100E · Structure no. 000000000024065

Built
1972
53 years old
Condition
Fair
inspected March 2024
Type
Tee Beam
Prestressed Concrete
Length
38 ft
1 main span
Daily traffic
100
2023 count
Owner
Local
Other Local Agency

About this bridge

1100 East Road over J Canal;se.Declo Br is a prestressed concrete tee beam carrying 1100 East Road over J Canal;se.Declo Br in Cassia County, Idaho. It was built in 1972, so it is 53 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 100 vehicles a day, roughly 10% of them trucks, projected to reach 150 by 2039. The structure is 38 ft (11.6 m) long and 30 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
Carries1100 East Road
CrossesJ Canal;se.Declo Br
Location.3S 2.5E DECLO;110S-1100E
RouteCounty Highway 0
CountyCassia County
StateIdaho
Coordinates42.51597, -113.58017
Functional classRural Local

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
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 geometry7: Better than present minimum criteria
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 typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length38 ft (11.6 m)
Longest span37 ft (11.3 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2023)
Projected traffic150 by 2039
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerOther Local Agency
Maintained byOther Local Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$437,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 1100 East Road over J Canal;se.Declo Br built?

It was built in 1972, making it 53 years old in 2025.

What condition is 1100 East Road over J Canal;se.Declo Br 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 1100 East Road over J Canal;se.Declo Br carry?

About 100 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is 1100 East Road over J Canal;se.Declo Br?

The structure is 38 ft (11.6 m) long with a longest span of 37 ft (11.3 m) and a deck 30 ft wide.

Who owns 1100 East Road over J Canal;se.Declo Br?

It is owned by the Other Local Agency.