US Bridges

Stc 7261;CUSTER ST over Portneuf River

Fair

Bannock County, Idaho · In Pocatello;custer St. · Structure no. 000000000021405

Built
1953
72 years old, rebuilt 2010
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
56 ft
1 main span
Daily traffic
4,500
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Stc 7261;CUSTER ST over Portneuf River is a steel stringer/multi-beam or girder carrying Stc 7261;CUSTER ST over Portneuf River in Bannock County, Idaho. It was built in 1953 and reconstructed in 2010, so it is 72 years old, older 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.

It carries about 4,500 vehicles a day, roughly 5% of them trucks, projected to reach 6,750 by 2042. The structure is 56 ft (17.1 m) long and 54 ft wide.

Location

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CarriesStc 7261;CUSTER ST
CrossesPortneuf River
LocationIn Pocatello;custer St.
RouteCity Street 7261
CountyBannock County
StateIdaho
Coordinates42.86547, -112.46392
Functional classUrban Collector

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55 US tons
Inventory rating33 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length56 ft (17.1 m)
Longest span53 ft (16.2 m)
Deck width54 ft (16.5 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,500 (2023)
Projected traffic6,750 by 2042
Trucks5%
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 Stc 7261;CUSTER ST over Portneuf River built?

It was built in 1953, making it 72 years old in 2025. It was reconstructed in 2010.

What condition is Stc 7261;CUSTER ST 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 2024.

How much traffic does Stc 7261;CUSTER ST over Portneuf River carry?

About 4,500 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Stc 7261;CUSTER ST over Portneuf River?

The structure is 56 ft (17.1 m) long with a longest span of 53 ft (16.2 m) and a deck 54 ft wide.

Who owns Stc 7261;CUSTER ST over Portneuf River?

It is owned by the City or Municipal Highway Agency.