US Bridges

Serenade Lane over Trail Creek

Fair

Blaine County, Idaho · 0.6 S Ketchum · Structure no. 000000000023668

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

About this bridge

Serenade Lane over Trail Creek is a prestressed concrete tee beam carrying Serenade Lane 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 56 ft (17.1 m) long and 39 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSerenade Lane
CrossesTrail Creek
Location0.6 S Ketchum
RouteCity Street 0
CountyBlaine County
StateIdaho
Coordinates43.67219, -114.36331
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.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length56 ft (17.1 m)
Longest span52 ft (15.9 m)
Deck width39 ft (11.9 m)
Roadway width26 ft (8 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Serenade Lane over Trail Creek built?

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

What condition is Serenade Lane 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 Serenade Lane over Trail Creek carry?

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

How long is Serenade Lane over Trail Creek?

The structure is 56 ft (17.1 m) long with a longest span of 52 ft (15.9 m) and a deck 39 ft wide.

Who owns Serenade Lane over Trail Creek?

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