US Bridges

Dollar Road over Trail Creek

Good

Blaine County, Idaho · In Sun Valley · Structure no. 000000000033320

Built
1988
37 years old
Condition
Good
inspected August 2022
Type
Culvert
Steel
Length
20 ft
1 main span
Daily traffic
5,000
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Dollar Road over Trail Creek is a steel culvert carrying Dollar Road over Trail Creek in Blaine County, Idaho. It was built in 1988, so it is 37 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 5,000 vehicles a day, roughly 5% of them trucks, projected to reach 7,500 by 2039. The structure is 20 ft (6.1 m) long and 60 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesDollar Road
CrossesTrail Creek
LocationIn Sun Valley
RouteCity Street 0
CountyBlaine County
StateIdaho
Coordinates43.69167, -114.35139
Functional classRural Local

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionAugust 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans1
Design loadHS 20
Structure length20 ft (6.1 m)
Longest span20 ft (6.1 m)
Deck width60 ft (18.3 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,000 (2023)
Projected traffic7,500 by 2039
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$415,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Dollar Road over Trail Creek built?

It was built in 1988, making it 37 years old in 2025.

What condition is Dollar Road over Trail Creek 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 August 2022.

How much traffic does Dollar Road over Trail Creek carry?

About 5,000 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Dollar Road over Trail Creek?

The structure is 20 ft (6.1 m) long with a longest span of 20 ft (6.1 m) and a deck 60 ft wide.

Who owns Dollar Road over Trail Creek?

It is owned by the City or Municipal Highway Agency.