US Bridges

Mica Mtn. Road over Wirr(nw Deary Op) Path

Good

Latah County, Idaho · 1.7 N. 2.2 W. Deary · Structure no. 000000000029446

Built
2024
1 years old
Condition
Good
inspected November 2024
Type
Culvert
Steel
Length
26 ft
1 main span
Daily traffic
1,000
2024 count
Owner
Local
Other Local Agency

About this bridge

Mica Mtn. Road over Wirr(nw Deary Op) Path is a steel culvert carrying Mica Mtn. Road over Wirr(nw Deary Op) Path in Latah County, Idaho. It was built in 2024, so it is 1 years old, younger than the Idaho average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,000 vehicles a day, roughly 20% of them trucks, projected to reach 1,850 by 2042. The structure is 26 ft (7.9 m) long and 60 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesMica Mtn. Road
CrossesWirr(nw Deary Op) Path
Location1.7 N. 2.2 W. Deary
RouteCounty Highway 0
CountyLatah County
StateIdaho
Coordinates46.82219, -116.60389
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Culvert9 ExcellentNo problems noted.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation9: Superior to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans1
Design loadHL 93
Structure length26 ft (7.9 m)
Longest span26 ft (7.9 m)
Deck width60 ft (18.3 m)
Roadway width29 ft (8.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,000 (2024)
Projected traffic1,850 by 2042
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesPedestrian / bicycle
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerOther Local Agency
Maintained byOther Local Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Mica Mtn. Road over Wirr(nw Deary Op) Path built?

It was built in 2024, making it 1 years old in 2025.

What condition is Mica Mtn. Road over Wirr(nw Deary Op) Path in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in November 2024.

How much traffic does Mica Mtn. Road over Wirr(nw Deary Op) Path carry?

About 1,000 vehicles per day (2024 count), of which roughly 20% are trucks.

How long is Mica Mtn. Road over Wirr(nw Deary Op) Path?

The structure is 26 ft (7.9 m) long with a longest span of 26 ft (7.9 m) and a deck 60 ft wide.

Who owns Mica Mtn. Road over Wirr(nw Deary Op) Path?

It is owned by the Other Local Agency.