SH 21 over S.fk.payette River

Good Condition56 years old1,200 vehicles/day

Location

StateIdaho
CountyBoise
Location18.9 Ne. Lowman
CarriesSH 21
CrossesS.fk.payette River
Coordinates44.13718, -115.31059

Condition Ratings

Overall ConditionGood
Deck7 (Good)
Superstructure8 (Very Good)
Substructure7 (Good)
Channel/Waterway8 (Very Good)
Scour Critical8 — Stable, low risk

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length174.9 ft (53.3 m)
Max Span100.1 ft (30.5 m)
Deck Width33.8 ft (10.3 m)
Deck Area549.0 sq m
Main Spans2
Year Built1970

Traffic

Avg Daily Traffic1,200 (2023)
Truck Traffic9%
Lanes On Bridge2

Inspection & Ownership

Last InspectionOctober 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Structure Number000000000012905

Nearby Bridges

SH 21 over Chapman Creek 0.2 mi Good SH 21 over Warm Springs Creek 0.5 mi Fair SH 21 over S.fk.payette River 3.1 mi Fair Grand Jean Road over Canyon Creek 4.1 mi Good