US Bridges

S5908;SCHOOLHOUSE over Trail Creek;naples Br

Fair

Boundary County, Idaho · At Naples · Structure no. 000000000030305

Built
1964
61 years old
Condition
Fair
inspected August 2024
Type
Frame
Concrete
Length
20 ft
1 main span
Daily traffic
1,200
2023 count
Owner
County
County Highway Agency

About this bridge

S5908;SCHOOLHOUSE over Trail Creek;naples Br is a concrete frame carrying S5908;SCHOOLHOUSE over Trail Creek;naples Br in Boundary County, Idaho. It was built in 1964, so it is 61 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 1,200 vehicles a day, roughly 3% of them trucks, projected to reach 1,800 by 2042. The structure is 20 ft (6.1 m) long and 31 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesS5908;SCHOOLHOUSE
CrossesTrail Creek;naples Br
LocationAt Naples
RouteCounty Highway 5908
CountyBoundary County
StateIdaho
Coordinates48.57058, -116.39108
Functional classRural Major Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating66 US tons
Inventory rating39 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length20 ft (6.1 m)
Longest span20 ft (6.1 m)
Deck width31 ft (9.4 m)
Roadway width25 ft (7.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,200 (2023)
Projected traffic1,800 by 2042
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$188,000
NavigationNo navigation control on waterway

Frequently asked questions

When was S5908;SCHOOLHOUSE over Trail Creek;naples Br built?

It was built in 1964, making it 61 years old in 2025.

What condition is S5908;SCHOOLHOUSE over Trail Creek;naples Br 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 August 2024.

How much traffic does S5908;SCHOOLHOUSE over Trail Creek;naples Br carry?

About 1,200 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is S5908;SCHOOLHOUSE over Trail Creek;naples Br?

The structure is 20 ft (6.1 m) long with a longest span of 20 ft (6.1 m) and a deck 31 ft wide.

Who owns S5908;SCHOOLHOUSE over Trail Creek;naples Br?

It is owned by the County Highway Agency.