US Bridges

US 95 over Trail Creek

Fair

Boundary County, Idaho · At Naples · Structure no. 000000000018755

Built
1965
60 years old
Condition
Fair
inspected June 2021
Type
Frame
Concrete
Length
23 ft
1 main span
Daily traffic
6,300
2023 count
Owner
State
State Highway Agency

About this bridge

US 95 over Trail Creek is a concrete frame carrying US 95 over Trail Creek in Boundary County, Idaho. It was built in 1965, so it is 60 years old, older 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 6,300 vehicles a day, roughly 24% of them trucks, projected to reach 9,450 by 2042. The structure is 23 ft (7 m) long and 57 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS 95
CrossesTrail Creek
LocationAt Naples
RouteU.S. Route 95
CountyBoundary County
StateIdaho
Coordinates48.57022, -116.39089
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2021
Inspection intervalevery 48 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 adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55 US tons
Inventory rating32 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length23 ft (7 m)
Longest span23 ft (7 m)
Deck width57 ft (17.4 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,300 (2023)
Projected traffic9,450 by 2042
Trucks24%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$546,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was US 95 over Trail Creek built?

It was built in 1965, making it 60 years old in 2025.

What condition is US 95 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 June 2021.

How much traffic does US 95 over Trail Creek carry?

About 6,300 vehicles per day (2023 count), of which roughly 24% are trucks.

How long is US 95 over Trail Creek?

The structure is 23 ft (7 m) long with a longest span of 23 ft (7 m) and a deck 57 ft wide.

Who owns US 95 over Trail Creek?

It is owned by the State Highway Agency.