US Bridges

S3760;FLTG Feather over Middleton Canal

Good

Ada County, Idaho · 1.0 N. 0.2 E. Star · Structure no. 000000000025920

Built
1988
37 years old
Condition
Good
inspected October 2024
Type
Frame
Concrete Continuous
Length
39 ft
2 main spans
Daily traffic
2,700
2023 count
Owner
County
County Highway Agency

About this bridge

S3760;FLTG Feather over Middleton Canal is a concrete continuous frame carrying S3760;FLTG Feather over Middleton Canal in Ada County, Idaho. It was built in 1988, so it is 37 years old, younger 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 2,700 vehicles a day, projected to reach 4,050 by 2042. The structure is 39 ft (11.9 m) long and 34 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesS3760;FLTG Feather
CrossesMiddleton Canal
Location1.0 N. 0.2 E. Star
RouteCounty Highway 3760
StateIdaho
Coordinates43.70655, -116.49024
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
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 typeFrame
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadH 20
Structure length39 ft (11.9 m)
Longest span19 ft (5.8 m)
Deck width34 ft (10.3 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,700 (2023)
Projected traffic4,050 by 2042
Trucks0%
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was S3760;FLTG Feather over Middleton Canal built?

It was built in 1988, making it 37 years old in 2025.

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 October 2024.

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

About 2,700 vehicles per day (2023 count).

How long is S3760;FLTG Feather over Middleton Canal?

The structure is 39 ft (11.9 m) long with a longest span of 19 ft (5.8 m) and a deck 34 ft wide.

Who owns S3760;FLTG Feather over Middleton Canal?

It is owned by the County Highway Agency.