Structure 26235 · Ada County, ID

Sma9803;maple Grve over I 84;maple Grove RD Gs

Carries Sma9803;maple Grve over I 84;maple Grove RD Gs, 4.4 W. Boise.

Overall conditionGood

Set by its lowest-rated component: Deck and Substructure at 7 of 9.

How ratings work
Decksets the rating7/9 · Good
Superstructure8/9 · Very Good
Substructuresets the rating7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT349 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9 · sets the ratingSuperstructure 8/9Substructure 7/9 · sets the rating

349 ft end to end, longest span 183 ft: about 5 semi-trucks nose to tail. Lengths and the semi-truck on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a multi-beam bridge.

Built198937 years old
Length349.1 ft106.4 m
Daily traffic23,000counted 2023
Last inspectedNovember 2022every 48 months

Location

StateIdaho
CountyAda
Location4.4 W. Boise
CarriesSma9803;maple Grve
CrossesI 84;maple Grove RD Gs
Coordinates43.59675, -116.29411

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length349.1 ft (106.4 m)
Max Span183.1 ft (55.8 m)
Deck Width69.6 ft (21.2 m)
Deck Area2255.7 sq m
Main Spans2
Year Built1989

Traffic

Avg Daily Traffic23,000 (2023)
Truck Traffic2%
Lanes On Bridge4
Lanes Under Bridge12

Inspection & Ownership

Last InspectionNovember 2022
Inspection FrequencyEvery 48 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour CriticalNot applicable
Structure Number000000000026235

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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