US Bridges

North Picabo Road over Silver Creek;n.Picabo B

FairPosted for load

Blaine County, Idaho · 0.6 N. Picabo · Structure no. 000000000023770

Built
1989
36 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
45 ft
2 main spans
Daily traffic
140
2023 count
Owner
County
County Highway Agency

About this bridge

North Picabo Road over Silver Creek;n.Picabo B is a steel stringer/multi-beam or girder carrying North Picabo Road over Silver Creek;n.Picabo B in Blaine County, Idaho. It was built in 1989, so it is 36 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 140 vehicles a day, roughly 17% of them trucks, projected to reach 210 by 2042. The structure is 45 ft (13.7 m) long and 23 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesNorth Picabo Road
CrossesSilver Creek;n.Picabo B
Location0.6 N. Picabo
RouteCounty Highway 0
CountyBlaine County
StateIdaho
Coordinates43.31786, -114.06606
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
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating52 US tons
Inventory rating39 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans2
Design loadH 15
Structure length45 ft (13.7 m)
Longest span22 ft (6.7 m)
Deck width23 ft (6.9 m)
Roadway width21 ft (6.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic140 (2023)
Projected traffic210 by 2042
Trucks17%
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$471,000 (2019 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was North Picabo Road over Silver Creek;n.Picabo B built?

It was built in 1989, making it 36 years old in 2025.

What condition is North Picabo Road over Silver Creek;n.Picabo B 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 2023.

How much traffic does North Picabo Road over Silver Creek;n.Picabo B carry?

About 140 vehicles per day (2023 count), of which roughly 17% are trucks.

How long is North Picabo Road over Silver Creek;n.Picabo B?

The structure is 45 ft (13.7 m) long with a longest span of 22 ft (6.7 m) and a deck 23 ft wide.

Who owns North Picabo Road over Silver Creek;n.Picabo B?

It is owned by the County Highway Agency.