Structure 19827 · Ada County, ID

Sma 3789;bogus over Main Fork Stuart Gulch

Carries Sma 3789;bogus over Main Fork Stuart Gulch, Boise;bogus Basin Road.

Overall conditionGood

Set by its lowest-rated component: Culvert at 7 of 9.

How ratings work
Culvertsets the rating7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT61 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 7/9

A culvert 61 ft across with 6 openings. Lengths and the car 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, so those are drawn as typical for a culvert.

Built199828 years old
Length61.0 ft18.6 m
Daily traffic820counted 2023
Last inspectedMarch 2023every 48 months

Location

StateIdaho
CountyAda
LocationBoise;bogus Basin Road
CarriesSma 3789;bogus
CrossesMain Fork Stuart Gulch
Coordinates43.67706, -116.18361

Physical Characteristics

MaterialConcrete
DesignCulvert
Total Length61.0 ft (18.6 m)
Max Span11.2 ft (3.4 m)
Deck Width53.1 ft (16.2 m)
Deck Area301.3 sq m
Main Spans6
Year Built1998

Traffic

Avg Daily Traffic820 (2023)
Truck Traffic3%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMarch 2023
Inspection FrequencyEvery 48 months
OwnerCounty Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical8 — Stable, low risk
Structure Number000000000019827

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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