US Bridges

Second Avenue over Trail Creek

Fair

Blaine County, Idaho · 0.4 S. 0.1 E. Ketchum · Structure no. 000000000023666

Built
1995
30 years old
Condition
Fair
inspected November 2023
Type
Tee Beam
Prestressed Concrete
Length
50 ft
1 main span
Daily traffic
500
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Second Avenue over Trail Creek is a prestressed concrete tee beam carrying Second Avenue over Trail Creek in Blaine County, Idaho. It was built in 1995, so it is 30 years old, younger than the Idaho average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 500 vehicles a day, roughly 10% of them trucks, projected to reach 750 by 2039. The structure is 50 ft (15.2 m) long and 42 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSecond Avenue
CrossesTrail Creek
Location0.4 S. 0.1 E. Ketchum
RouteCity Street 0
CountyBlaine County
StateIdaho
Coordinates43.67411, -114.36236
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38 US tons
Inventory rating23 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length50 ft (15.2 m)
Longest span50 ft (15.2 m)
Deck width42 ft (12.8 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic500 (2023)
Projected traffic750 by 2039
Trucks10%
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 byPrivate (other than railroad)
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$780,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Second Avenue over Trail Creek built?

It was built in 1995, making it 30 years old in 2025.

What condition is Second Avenue over Trail Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in November 2023.

How much traffic does Second Avenue over Trail Creek carry?

About 500 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Second Avenue over Trail Creek?

The structure is 50 ft (15.2 m) long with a longest span of 50 ft (15.2 m) and a deck 42 ft wide.

Who owns Second Avenue over Trail Creek?

It is owned by the City or Municipal Highway Agency and maintained by the Private (other than railroad).