US Bridges

Stc 3830;FREEMONT over Payette River

Fair

Payette County, Idaho · 1.4S 5.1E New Plymouth · Structure no. 000000000028475

Built
1961
64 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Concrete
Length
320 ft
8 main spans
Daily traffic
480
2023 count
Owner
County
County Highway Agency

About this bridge

Stc 3830;FREEMONT over Payette River is a concrete stringer/multi-beam or girder carrying Stc 3830;FREEMONT over Payette River in Payette County, Idaho. It was built in 1961, so it is 64 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 480 vehicles a day, roughly 4% of them trucks, projected to reach 720 by 2042. The structure is 320 ft (97.5 m) long and 23 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

Location

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CarriesStc 3830;FREEMONT
CrossesPayette River
Location1.4S 5.1E New Plymouth
RouteCounty Highway 3830
CountyPayette County
StateIdaho
Coordinates43.95381, -116.71767
Functional classRural Major 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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating43 US tons
Inventory rating26 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete
DeckConcrete, cast-in-place
Main spans8
Design loadH 15
Structure length320 ft (97.5 m)
Longest span40 ft (12.2 m)
Deck width23 ft (6.9 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic480 (2023)
Projected traffic720 by 2042
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 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$3 million (2019 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Stc 3830;FREEMONT over Payette River built?

It was built in 1961, making it 64 years old in 2025.

What condition is Stc 3830;FREEMONT over Payette 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 June 2023.

How much traffic does Stc 3830;FREEMONT over Payette River carry?

About 480 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Stc 3830;FREEMONT over Payette River?

The structure is 320 ft (97.5 m) long with a longest span of 40 ft (12.2 m) and a deck 23 ft wide.

Who owns Stc 3830;FREEMONT over Payette River?

It is owned by the County Highway Agency.