US Bridges

SH 44 over Middleton Canal

Fair

Ada County, Idaho · 1.8 W. Eagle · Structure no. 000000000014280

Built
1959
66 years old, rebuilt 2013
Condition
Fair
inspected February 2024
Type
Frame
Concrete
Length
40 ft
1 main span
Daily traffic
13,500
2023 count
Owner
State
State Highway Agency

About this bridge

SH 44 over Middleton Canal is a concrete frame carrying SH 44 over Middleton Canal in Ada County, Idaho. It was built in 1959 and reconstructed in 2013, so it is 66 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 13,500 vehicles a day, roughly 7% of them trucks, projected to reach 20,250 by 2042. The structure is 40 ft (12.2 m) long and 84 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesSH 44
CrossesMiddleton Canal
Location1.8 W. Eagle
RouteState Highway 44
CountyAda County
StateIdaho
Coordinates43.69511, -116.40539
Functional classUrban Other Principal Arterial

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46 US tons
Inventory rating27 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length40 ft (12.2 m)
Longest span36 ft (11 m)
Deck width84 ft (25.6 m)
Roadway width81 ft (24.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,500 (2023)
Projected traffic20,250 by 2042
Trucks7%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 SH 44 over Middleton Canal built?

It was built in 1959, making it 66 years old in 2025. It was reconstructed in 2013.

What condition is SH 44 over Middleton 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 SH 44 over Middleton Canal carry?

About 13,500 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is SH 44 over Middleton Canal?

The structure is 40 ft (12.2 m) long with a longest span of 36 ft (11 m) and a deck 84 ft wide.

Who owns SH 44 over Middleton Canal?

It is owned by the State Highway Agency.