US Bridges

Clark Street over Portneuf River

Fair

Bannock County, Idaho · In Pocatello; Clark St. · Structure no. 000000000022196

Built
1998
27 years old
Condition
Fair
inspected September 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
53 ft
1 main span
Daily traffic
400
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Clark Street over Portneuf River is a prestressed concrete stringer/multi-beam or girder carrying Clark Street over Portneuf River in Bannock County, Idaho. It was built in 1998, so it is 27 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 400 vehicles a day, roughly 10% of them trucks, projected to reach 600 by 2039. The structure is 53 ft (16.2 m) long and 53 ft wide.

CarriesClark Street
CrossesPortneuf River
LocationIn Pocatello; Clark St.
RouteCity Street 0
StateIdaho
Coordinates42.85992, -112.45617
Functional classUrban 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.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating81 US tons
Inventory rating44 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length53 ft (16.2 m)
Longest span51 ft (15.5 m)
Deck width53 ft (16.3 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic400 (2023)
Projected traffic600 by 2039
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Clark Street over Portneuf River built?

It was built in 1998, making it 27 years old in 2025.

What condition is Clark Street over Portneuf River 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 Clark Street over Portneuf River carry?

About 400 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Clark Street over Portneuf River?

The structure is 53 ft (16.2 m) long with a longest span of 51 ft (15.5 m) and a deck 53 ft wide.

Who owns Clark Street over Portneuf River?

It is owned by the City or Municipal Highway Agency.