US Bridges

Stc 9203;BARRISTER over Ridenbaugh Canal

Fair

Ada County, Idaho · In Boise;barrister Dr. · Structure no. 000000000025740

Built
1978
47 years old
Condition
Fair
inspected March 2023
Type
Tee Beam
Prestressed Concrete
Length
50 ft
1 main span
Daily traffic
6,500
2023 count
Owner
County
County Highway Agency

About this bridge

Stc 9203;BARRISTER over Ridenbaugh Canal is a prestressed concrete tee beam carrying Stc 9203;BARRISTER over Ridenbaugh Canal in Ada County, Idaho. It was built in 1978, so it is 47 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 6,500 vehicles a day, roughly 8% of them trucks, projected to reach 9,750 by 2042. The structure is 50 ft (15.2 m) long and 51 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesStc 9203;BARRISTER
CrossesRidenbaugh Canal
LocationIn Boise;barrister Dr.
RouteCity Street 9203
CountyAda County
StateIdaho
Coordinates43.60694, -116.27358
Functional classUrban Collector

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 protection8 Very GoodNo problems noted.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38 US tons
Inventory rating23 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length50 ft (15.2 m)
Longest span49 ft (14.9 m)
Deck width51 ft (15.6 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,500 (2023)
Projected traffic9,750 by 2042
Trucks8%
Lanes on structure3
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.1 million (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Stc 9203;BARRISTER over Ridenbaugh Canal built?

It was built in 1978, making it 47 years old in 2025.

What condition is Stc 9203;BARRISTER 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 March 2023.

How much traffic does Stc 9203;BARRISTER over Ridenbaugh Canal carry?

About 6,500 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is Stc 9203;BARRISTER over Ridenbaugh Canal?

The structure is 50 ft (15.2 m) long with a longest span of 49 ft (14.9 m) and a deck 51 ft wide.

Who owns Stc 9203;BARRISTER over Ridenbaugh Canal?

It is owned by the County Highway Agency.