US Bridges

Stp 7403;FRANKLIN over Ridenbaugh Canal

Fair

Ada County, Idaho · Franklin RD in Boise · Structure no. 000000000021526

Built
1995
30 years old
Condition
Fair
inspected November 2021
Type
Frame
Concrete
Length
34 ft
1 main span
Daily traffic
22,500
2023 count
Owner
County
County Highway Agency

About this bridge

Stp 7403;FRANKLIN over Ridenbaugh Canal is a concrete frame carrying Stp 7403;FRANKLIN over Ridenbaugh Canal in Ada County, Idaho. It was built in 1995, so it is 30 years old, younger 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 22,500 vehicles a day, roughly 2% of them trucks, projected to reach 33,750 by 2042. The structure is 34 ft (10.4 m) long and 78 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesStp 7403;FRANKLIN
CrossesRidenbaugh Canal
LocationFranklin RD in Boise
RouteCounty Highway 7403
CountyAda County
StateIdaho
Coordinates43.60495, -116.31125
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 inspectionNovember 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to 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 rating110.1 US tons
Inventory rating105.1 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length34 ft (10.4 m)
Longest span34 ft (10.4 m)
Deck width78 ft (23.8 m)
Roadway width64 ft (19.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic22,500 (2023)
Projected traffic33,750 by 2042
Trucks2%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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 Stp 7403;FRANKLIN over Ridenbaugh Canal built?

It was built in 1995, making it 30 years old in 2025.

What condition is Stp 7403;FRANKLIN over Ridenbaugh 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 2021.

How much traffic does Stp 7403;FRANKLIN over Ridenbaugh Canal carry?

About 22,500 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is Stp 7403;FRANKLIN over Ridenbaugh Canal?

The structure is 34 ft (10.4 m) long with a longest span of 34 ft (10.4 m) and a deck 78 ft wide.

Who owns Stp 7403;FRANKLIN over Ridenbaugh Canal?

It is owned by the County Highway Agency.