US Bridges

100 North Road over Main Northside Canal

Fair

Minidoka County, Idaho · 1.0 N. 1.0 E. Rupert · Structure no. 000000000025135

Built
1975
50 years old
Condition
Fair
inspected March 2023
Type
Tee Beam
Prestressed Concrete
Length
48 ft
1 main span
Daily traffic
200
2023 count
Owner
County
County Highway Agency

About this bridge

100 North Road over Main Northside Canal is a prestressed concrete tee beam carrying 100 North Road over Main Northside Canal in Minidoka County, Idaho. It was built in 1975, so it is 50 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 200 vehicles a day, roughly 10% of them trucks, projected to reach 300 by 2039. The structure is 48 ft (14.6 m) long and 26 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
Carries100 North Road
CrossesMain Northside Canal
Location1.0 N. 1.0 E. Rupert
RouteCounty Highway 0
CountyMinidoka County
StateIdaho
Coordinates42.63411, -113.64822
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating38 US tons
Inventory rating23 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadH 15
Structure length48 ft (14.6 m)
Longest span46 ft (14 m)
Deck width26 ft (8 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (2023)
Projected traffic300 by 2039
Trucks10%
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$521,000 (2017 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 100 North Road over Main Northside Canal built?

It was built in 1975, making it 50 years old in 2025.

What condition is 100 North Road over Main Northside 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 100 North Road over Main Northside Canal carry?

About 200 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is 100 North Road over Main Northside Canal?

The structure is 48 ft (14.6 m) long with a longest span of 46 ft (14 m) and a deck 26 ft wide.

Who owns 100 North Road over Main Northside Canal?

It is owned by the County Highway Agency.