US Bridges

SMA9803;MAPLE Grve over Ridenbaugh Canal

Good

Ada County, Idaho · In Boise; Maple Grove · Structure no. 000000000025816

Built
2008
17 years old
Condition
Good
inspected October 2022
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
30 ft
1 main span
Daily traffic
23,000
2023 count
Owner
County
County Highway Agency

About this bridge

SMA9803;MAPLE Grve over Ridenbaugh Canal is a prestressed concrete box beam or girders - multiple carrying SMA9803;MAPLE Grve over Ridenbaugh Canal in Ada County, Idaho. It was built in 2008, so it is 17 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 23,000 vehicles a day, roughly 2% of them trucks, projected to reach 34,500 by 2042. The structure is 30 ft (9.1 m) long and 88 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesSMA9803;MAPLE Grve
CrossesRidenbaugh Canal
LocationIn Boise; Maple Grove
RouteCity Street 9803
CountyAda County
StateIdaho
Coordinates43.61242, -116.29419
Functional classUrban Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating85 US tons
Inventory rating40 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 25 or greater
Structure length30 ft (9.1 m)
Longest span29 ft (8.9 m)
Deck width88 ft (26.9 m)
Roadway width72 ft (21.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic23,000 (2023)
Projected traffic34,500 by 2042
Trucks2%
Lanes on structure5
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 SMA9803;MAPLE Grve over Ridenbaugh Canal built?

It was built in 2008, making it 17 years old in 2025.

What condition is SMA9803;MAPLE Grve 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 October 2022.

How much traffic does SMA9803;MAPLE Grve over Ridenbaugh Canal carry?

About 23,000 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is SMA9803;MAPLE Grve over Ridenbaugh Canal?

The structure is 30 ft (9.1 m) long with a longest span of 29 ft (8.9 m) and a deck 88 ft wide.

Who owns SMA9803;MAPLE Grve over Ridenbaugh Canal?

It is owned by the County Highway Agency.