US Bridges

SMA9803;MAPLE Grve over I 84;MAPLE Grove RD Gs

Good

Ada County, Idaho · 4.4 W. Boise · Structure no. 000000000026235

Built
1989
36 years old
Condition
Good
inspected November 2022
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
349 ft
2 main spans
Daily traffic
23,000
2023 count
Owner
State
State Highway Agency

About this bridge

SMA9803;MAPLE Grve over I 84;MAPLE Grove RD Gs is a steel continuous stringer/multi-beam or girder carrying SMA9803;MAPLE Grve over I 84;MAPLE Grove RD Gs 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 23,000 vehicles a day, roughly 2% of them trucks, projected to reach 34,500 by 2042. The structure is 349 ft (106.4 m) long and 70 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesSMA9803;MAPLE Grve
CrossesI 84;MAPLE Grove RD Gs
Location4.4 W. Boise
RouteCounty Highway 9803
CountyAda County
StateIdaho
Coordinates43.59675, -116.29411
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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionNovember 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71 US tons
Inventory rating42 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length349 ft (106.4 m)
Longest span183 ft (55.8 m)
Deck width70 ft (21.2 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic23,000 (2023)
Projected traffic34,500 by 2042
Trucks2%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$5.8 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was SMA9803;MAPLE Grve over I 84;MAPLE Grove RD Gs built?

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

What condition is SMA9803;MAPLE Grve over I 84;MAPLE Grove RD Gs 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 November 2022.

How much traffic does SMA9803;MAPLE Grve over I 84;MAPLE Grove RD Gs carry?

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

How long is SMA9803;MAPLE Grve over I 84;MAPLE Grove RD Gs?

The structure is 349 ft (106.4 m) long with a longest span of 183 ft (55.8 m) and a deck 70 ft wide.

Who owns SMA9803;MAPLE Grve over I 84;MAPLE Grove RD Gs?

It is owned by the State Highway Agency.