US Bridges

Stc 3838;PLAZA RD over Payette River;plaza Br.

Fair

Gem County, Idaho · 3.3 N. 2.8 E. Emmett · Structure no. 000000000019940

Built
1959
66 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Concrete
Length
240 ft
6 main spans
Daily traffic
990
2023 count
Owner
County
County Highway Agency

About this bridge

Stc 3838;PLAZA RD over Payette River;plaza Br. is a concrete stringer/multi-beam or girder carrying Stc 3838;PLAZA RD over Payette River;plaza Br. in Gem County, Idaho. It was built in 1959, so it is 66 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 990 vehicles a day, roughly 8% of them trucks, projected to reach 1,485 by 2042. The structure is 240 ft (73.2 m) long and 27 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesStc 3838;PLAZA RD
CrossesPayette River;plaza Br.
Location3.3 N. 2.8 E. Emmett
RouteCounty Highway 3838
CountyGem County
StateIdaho
Coordinates43.9225, -116.44486
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 alignment6: Equal to present minimum criteria
Operating rating51 US tons
Inventory rating30 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete
DeckConcrete, cast-in-place
Main spans6
Design loadH 15
Structure length240 ft (73.2 m)
Longest span39 ft (11.9 m)
Deck width27 ft (8.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic990 (2023)
Projected traffic1,485 by 2042
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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$3.3 million (2017 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Stc 3838;PLAZA RD over Payette River;plaza Br. built?

It was built in 1959, making it 66 years old in 2025.

What condition is Stc 3838;PLAZA RD over Payette River;plaza 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 July 2023.

How much traffic does Stc 3838;PLAZA RD over Payette River;plaza Br. carry?

About 990 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is Stc 3838;PLAZA RD over Payette River;plaza Br.?

The structure is 240 ft (73.2 m) long with a longest span of 39 ft (11.9 m) and a deck 27 ft wide.

Who owns Stc 3838;PLAZA RD over Payette River;plaza Br.?

It is owned by the County Highway Agency.