US 20 over Knowlton Creek

Fair Condition68 years old1,900 vehicles/day

Location

StateIdaho
CountyCamas
Location3.4 E. Fairfield
CarriesUS 20
CrossesKnowlton Creek
Coordinates43.34222, -114.72373

Condition Ratings

Overall ConditionFair
Deck6 (Satisfactory)
Superstructure6 (Satisfactory)
Substructure6 (Satisfactory)
Channel/Waterway5 (Fair)
Scour Critical3 — Scour critical

Physical Characteristics

MaterialConcrete
DesignStringer/Multi-beam
Total Length29.9 ft (9.1 m)
Max Span28.9 ft (8.8 m)
Deck Width30.5 ft (9.3 m)
Deck Area84.6 sq m
Main Spans1
Year Built1958

Traffic

Avg Daily Traffic1,900 (2023)
Truck Traffic25%
Lanes On Bridge2

Inspection & Ownership

Last Inspection823
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Structure Number000000000015065

Nearby Bridges

SH 46 over Knowlton Creek 0.9 mi Fair US 20 over Johnson Creek 1.5 mi Fair SH 46 over Minear Creek 1.7 mi Poor US 20 over E.fk.soldier Creek 2.3 mi Fair SH 46 over Soldier Creek 2.8 mi Fair 200 South Road over Knowlton Creek 3.2 mi Good Soldier Creek over E 100 South Road 3.2 mi Fair SH 46 over Soldier Creek 3.2 mi Fair US 20 over Soldier Creek 3.2 mi Fair E 100 N Road over Soldier Creek 3.2 mi Fair