US Bridges

STC3906;WARREN Wgn over N.Fk.Payette River

Fair

Valley County, Idaho · 16.0 N. 4.0 E. Mccall · Structure no. 000000000020105

Built
1969
56 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
161 ft
3 main spans
Daily traffic
550
2023 count
Owner
County
County Highway Agency

About this bridge

STC3906;WARREN Wgn over N.Fk.Payette River is a prestressed concrete stringer/multi-beam or girder carrying STC3906;WARREN Wgn over N.Fk.Payette River in Valley County, Idaho. It was built in 1969, so it is 56 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 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 550 vehicles a day, roughly 2% of them trucks, projected to reach 825 by 2042. The structure is 161 ft (49.1 m) long and 34 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

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CarriesSTC3906;WARREN Wgn
CrossesN.Fk.Payette River
Location16.0 N. 4.0 E. Mccall
RouteCounty Highway 3906
CountyValley County
StateIdaho
Coordinates45.11211, -116.02636
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being 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
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length161 ft (49.1 m)
Longest span53 ft (16.2 m)
Deck width34 ft (10.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic550 (2023)
Projected traffic825 by 2042
Trucks2%
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 STC3906;WARREN Wgn over N.Fk.Payette River built?

It was built in 1969, making it 56 years old in 2025.

What condition is STC3906;WARREN Wgn over N.Fk.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 August 2024.

How much traffic does STC3906;WARREN Wgn over N.Fk.Payette River carry?

About 550 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is STC3906;WARREN Wgn over N.Fk.Payette River?

The structure is 161 ft (49.1 m) long with a longest span of 53 ft (16.2 m) and a deck 34 ft wide.

Who owns STC3906;WARREN Wgn over N.Fk.Payette River?

It is owned by the County Highway Agency.