US Bridges

Pebble Creek Road over Portneuf R;pebble Br

Fair

Caribou County, Idaho · 1.6 N. 5.5 W. Bancroft · Structure no. 000000000023195

Built
1984
41 years old
Condition
Fair
inspected April 2021
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
71 ft
1 main span
Daily traffic
115
2023 count
Owner
County
County Highway Agency

About this bridge

Pebble Creek Road over Portneuf R;pebble Br is a prestressed concrete stringer/multi-beam or girder carrying Pebble Creek Road over Portneuf R;pebble Br in Caribou County, Idaho. It was built in 1984, so it is 41 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 115 vehicles a day, roughly 10% of them trucks, projected to reach 173 by 2039. The structure is 71 ft (21.6 m) long and 26 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesPebble Creek Road
CrossesPortneuf R;pebble Br
Location1.6 N. 5.5 W. Bancroft
RouteCounty Highway 0
CountyCaribou County
StateIdaho
Coordinates42.74361, -112.00306
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.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating69 US tons
Inventory rating43.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length71 ft (21.6 m)
Longest span68 ft (20.7 m)
Deck width26 ft (7.8 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic115 (2023)
Projected traffic173 by 2039
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed98.8 mi (159 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 Pebble Creek Road over Portneuf R;pebble Br built?

It was built in 1984, making it 41 years old in 2025.

What condition is Pebble Creek Road over Portneuf R;pebble 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 April 2021.

How much traffic does Pebble Creek Road over Portneuf R;pebble Br carry?

About 115 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Pebble Creek Road over Portneuf R;pebble Br?

The structure is 71 ft (21.6 m) long with a longest span of 68 ft (20.7 m) and a deck 26 ft wide.

Who owns Pebble Creek Road over Portneuf R;pebble Br?

It is owned by the County Highway Agency.