US Bridges

S3760;FLTG Feather over Middleton Canal

Good

Ada County, Idaho · 1.0 N. 0.5 W. Star · Structure no. 000000000025960

Built
1966
59 years old, rebuilt 1993
Condition
Good
inspected November 2023
Type
Tee Beam
Prestressed Concrete
Length
31 ft
1 main span
Daily traffic
3,600
2023 count
Owner
County
County Highway Agency

About this bridge

S3760;FLTG Feather over Middleton Canal is a prestressed concrete tee beam carrying S3760;FLTG Feather over Middleton Canal in Ada County, Idaho. It was built in 1966 and reconstructed in 1993, so it is 59 years old, older than the Idaho average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 3,600 vehicles a day, projected to reach 5,400 by 2042. The structure is 31 ft (9.4 m) long and 31 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesS3760;FLTG Feather
CrossesMiddleton Canal
Location1.0 N. 0.5 W. Star
RouteCounty Highway 3760
CountyAda County
StateIdaho
Coordinates43.70667, -116.50119
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length31 ft (9.4 m)
Longest span30 ft (9.1 m)
Deck width31 ft (9.4 m)
Roadway width29 ft (8.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,600 (2023)
Projected traffic5,400 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 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$618,000 (2019 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was S3760;FLTG Feather over Middleton Canal built?

It was built in 1966, making it 59 years old in 2025. It was reconstructed in 1993.

What condition is S3760;FLTG Feather over Middleton Canal in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in November 2023.

How much traffic does S3760;FLTG Feather over Middleton Canal carry?

About 3,600 vehicles per day (2023 count).

How long is S3760;FLTG Feather over Middleton Canal?

The structure is 31 ft (9.4 m) long with a longest span of 30 ft (9.1 m) and a deck 31 ft wide.

Who owns S3760;FLTG Feather over Middleton Canal?

It is owned by the County Highway Agency.