IRR BIA Route 1 over Main Canal

Fair Condition50 years old1,200 vehicles/day

Location

StateMontana
CountyValley
Location1.0 Km SW Of Oswego
CarriesIRR BIA Route 1
CrossesMain Canal
Coordinates48.05147, -105.88728

Condition Ratings

Overall ConditionFair
Deck6 (Satisfactory)
Superstructure7 (Good)
Substructure6 (Satisfactory)
Channel/Waterway7 (Good)
Scour Critical4 — Foundations need monitoring

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length42.0 ft (12.8 m)
Max Span40.0 ft (12.2 m)
Deck Width34.1 ft (10.4 m)
Deck Area133.1 sq m
Main Spans1
Year Built1976

Traffic

Avg Daily Traffic1,200 (2024)
Truck Traffic10%
Lanes On Bridge2

Inspection & Ownership

Last InspectionOctober 2024
Inspection FrequencyEvery 24 months
OwnerBureau of Indian Affairs
Historical SignificanceBridge is not eligible for the National Register
Structure Number00000000000C614

Nearby Bridges

IRR - US 2 over Oswego Creek 1.0 mi Fair IRR BIA RTE 10 over Oswego East Main Canal 1.0 mi Fair IRR BIA RTE 8 over Oswego South Main Canal 2.0 mi Good IRR BIA Route 1 over Main Canal 2.5 mi Good IRR BIA RTE 30 over Main Canal 3.1 mi Fair IRR - US 2 over Flynn Creek 3.2 mi Fair S 528 over Prairie Elk Creek 021 3.7 mi Fair IRR BIA RTE 30 over Main Canal 4.1 mi Fair