US Bridges

Sma 3789;BOGUS over Main Fork Stuart Gulch

Good

Ada County, Idaho · Boise;bogus Basin Road · Structure no. 000000000019827

Built
1998
27 years old
Condition
Good
inspected March 2023
Type
Culvert
Concrete
Length
61 ft
6 main spans
Daily traffic
820
2023 count
Owner
County
County Highway Agency

About this bridge

Sma 3789;BOGUS over Main Fork Stuart Gulch is a concrete culvert carrying Sma 3789;BOGUS over Main Fork Stuart Gulch in Ada County, Idaho. It was built in 1998, so it is 27 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 820 vehicles a day, roughly 3% of them trucks, projected to reach 1,230 by 2042. The structure is 61 ft (18.6 m) long and 53 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesSma 3789;BOGUS
CrossesMain Fork Stuart Gulch
LocationBoise;bogus Basin Road
RouteCounty Highway 3789
StateIdaho
Coordinates43.67706, -116.18361
Functional classRural 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
Culvert7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating110.1 US tons
Inventory rating61.9 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans6
Design loadHS 25 or greater
Structure length61 ft (18.6 m)
Longest span11 ft (3.4 m)
Deck width53 ft (16.2 m)
Roadway width53 ft (16.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic820 (2023)
Projected traffic1,230 by 2042
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRelief for waterway
Detour if closed98.8 mi (159 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 Sma 3789;BOGUS over Main Fork Stuart Gulch built?

It was built in 1998, making it 27 years old in 2025.

What condition is Sma 3789;BOGUS over Main Fork Stuart Gulch 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 March 2023.

How much traffic does Sma 3789;BOGUS over Main Fork Stuart Gulch carry?

About 820 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Sma 3789;BOGUS over Main Fork Stuart Gulch?

The structure is 61 ft (18.6 m) long with a longest span of 11 ft (3.4 m) and a deck 53 ft wide.

Who owns Sma 3789;BOGUS over Main Fork Stuart Gulch?

It is owned by the County Highway Agency.