US Bridges

Stc 9733;LAW Drive over Ridenbaugh Canal

Good

Ada County, Idaho · In Boise;law Dr&boise Ave · Structure no. 000000000025855

Built
1989
36 years old
Condition
Good
inspected March 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
43 ft
1 main span
Daily traffic
1,400
2023 count
Owner
County
County Highway Agency

About this bridge

Stc 9733;LAW Drive over Ridenbaugh Canal is a prestressed concrete box beam or girders - multiple carrying Stc 9733;LAW Drive over Ridenbaugh Canal in Ada County, Idaho. It was built in 1989, so it is 36 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 1,400 vehicles a day, roughly 11% of them trucks, projected to reach 2,100 by 2042. The structure is 43 ft (13.1 m) long and 52 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesStc 9733;LAW Drive
CrossesRidenbaugh Canal
LocationIn Boise;law Dr&boise Ave
RouteCity Street 9733
CountyAda County
StateIdaho
Coordinates43.57433, -116.16344
Functional classUrban 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 protection9 ExcellentNo problems noted.
Last inspectionMarch 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating108 US tons
Inventory rating65 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length43 ft (13.1 m)
Longest span40 ft (12.2 m)
Deck width52 ft (15.8 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,400 (2023)
Projected traffic2,100 by 2042
Trucks11%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway
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 Stc 9733;LAW Drive over Ridenbaugh Canal built?

It was built in 1989, making it 36 years old in 2025.

What condition is Stc 9733;LAW Drive over Ridenbaugh 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 March 2023.

How much traffic does Stc 9733;LAW Drive over Ridenbaugh Canal carry?

About 1,400 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is Stc 9733;LAW Drive over Ridenbaugh Canal?

The structure is 43 ft (13.1 m) long with a longest span of 40 ft (12.2 m) and a deck 52 ft wide.

Who owns Stc 9733;LAW Drive over Ridenbaugh Canal?

It is owned by the County Highway Agency.