US Bridges

STC2866;300 N. Rd. over Main Northside Canal

Fair

Minidoka County, Idaho · 0.5 S. 0.5 W. Acequia · Structure no. 000000000025125

Built
1979
46 years old
Condition
Fair
inspected November 2024
Type
Tee Beam
Prestressed Concrete
Length
58 ft
2 main spans
Daily traffic
450
2023 count
Owner
County
County Highway Agency

About this bridge

STC2866;300 N. Rd. over Main Northside Canal is a prestressed concrete tee beam carrying STC2866;300 N. Rd. over Main Northside Canal in Minidoka County, Idaho. It was built in 1979, so it is 46 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 450 vehicles a day, roughly 32% of them trucks, projected to reach 675 by 2042. The structure is 58 ft (17.7 m) long and 30 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesSTC2866;300 N. Rd.
CrossesMain Northside Canal
Location0.5 S. 0.5 W. Acequia
RouteCounty Highway 2866
CountyMinidoka County
StateIdaho
Coordinates42.66275, -113.60875
Functional classRural Minor 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
Deck8 Very GoodNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2024
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 alignment8: Equal to present desirable criteria
Operating rating38 US tons
Inventory rating23 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans2
Design loadHS 20
Structure length58 ft (17.7 m)
Longest span28 ft (8.5 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic450 (2023)
Projected traffic675 by 2042
Trucks32%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 STC2866;300 N. Rd. over Main Northside Canal built?

It was built in 1979, making it 46 years old in 2025.

What condition is STC2866;300 N. Rd. 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 November 2024.

How much traffic does STC2866;300 N. Rd. over Main Northside Canal carry?

About 450 vehicles per day (2023 count), of which roughly 32% are trucks.

How long is STC2866;300 N. Rd. over Main Northside Canal?

The structure is 58 ft (17.7 m) long with a longest span of 28 ft (8.5 m) and a deck 30 ft wide.

Who owns STC2866;300 N. Rd. over Main Northside Canal?

It is owned by the County Highway Agency.