US Bridges

Old County Road over Carpenter Cr;se.Fernwood

Fair

Benewah County, Idaho · 1.6 S. 0.8 E. Fernwood · Structure no. 000000000030065

Built
1985
40 years old
Condition
Fair
inspected September 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
62 ft
1 main span
Daily traffic
170
2023 count
Owner
County
County Highway Agency

About this bridge

Old County Road over Carpenter Cr;se.Fernwood is a prestressed concrete stringer/multi-beam or girder carrying Old County Road over Carpenter Cr;se.Fernwood in Benewah County, Idaho. It was built in 1985, so it is 40 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 170 vehicles a day, roughly 6% of them trucks, projected to reach 255 by 2042. The structure is 62 ft (18.9 m) long and 32 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

Location

Open in Google Maps
CarriesOld County Road
CrossesCarpenter Cr;se.Fernwood
Location1.6 S. 0.8 E. Fernwood
RouteCounty Highway 0
CountyBenewah County
StateIdaho
Coordinates47.08836, -116.37594
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating59.5 US tons
Inventory rating42.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length62 ft (18.9 m)
Longest span58 ft (17.7 m)
Deck width32 ft (9.9 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic170 (2023)
Projected traffic255 by 2042
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.3 mi (23 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Old County Road over Carpenter Cr;se.Fernwood built?

It was built in 1985, making it 40 years old in 2025.

What condition is Old County Road over Carpenter Cr;se.Fernwood 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 September 2022.

How much traffic does Old County Road over Carpenter Cr;se.Fernwood carry?

About 170 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is Old County Road over Carpenter Cr;se.Fernwood?

The structure is 62 ft (18.9 m) long with a longest span of 58 ft (17.7 m) and a deck 32 ft wide.

Who owns Old County Road over Carpenter Cr;se.Fernwood?

It is owned by the County Highway Agency.