US Bridges

Sma 9833;MILWAUKEE over Ridenbaugh Canal

Fair

Ada County, Idaho · In Boise;milwaukee ST · Structure no. 000000000025840

Built
1979
46 years old
Condition
Fair
inspected November 2023
Type
Tee Beam
Prestressed Concrete
Length
26 ft
1 main span
Daily traffic
17,500
2023 count
Owner
County
County Highway Agency

About this bridge

Sma 9833;MILWAUKEE over Ridenbaugh Canal is a prestressed concrete tee beam carrying Sma 9833;MILWAUKEE over Ridenbaugh Canal in Ada 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 17,500 vehicles a day, roughly 5% of them trucks, projected to reach 26,250 by 2042. The structure is 26 ft (7.9 m) long and 80 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesSma 9833;MILWAUKEE
CrossesRidenbaugh Canal
LocationIn Boise;milwaukee ST
RouteCity Street 9833
CountyAda County
StateIdaho
Coordinates43.61336, -116.28416
Functional classUrban Minor 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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 rating52 US tons
Inventory rating31 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length26 ft (7.9 m)
Longest span25 ft (7.6 m)
Deck width80 ft (24.4 m)
Roadway width63 ft (19.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,500 (2023)
Projected traffic26,250 by 2042
Trucks5%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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 Sma 9833;MILWAUKEE over Ridenbaugh Canal built?

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

What condition is Sma 9833;MILWAUKEE 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 2023.

How much traffic does Sma 9833;MILWAUKEE over Ridenbaugh Canal carry?

About 17,500 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Sma 9833;MILWAUKEE over Ridenbaugh Canal?

The structure is 26 ft (7.9 m) long with a longest span of 25 ft (7.6 m) and a deck 80 ft wide.

Who owns Sma 9833;MILWAUKEE over Ridenbaugh Canal?

It is owned by the County Highway Agency.