IRR - I 90 over Little Bighorn River

Fair Condition77 years old3,889 vehicles/day

Location

StateMontana
CountyBig Horn
Location0.6m S Crow Agency
CarriesIRR - I 90
CrossesLittle Bighorn River
Coordinates45.59659, -107.46185

Condition Ratings

Overall ConditionFair
Deck6 (Satisfactory)
Superstructure6 (Satisfactory)
Substructure5 (Fair)
Channel/Waterway6 (Satisfactory)
Scour Critical5 — Stable for scour

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length129.9 ft (39.6 m)
Max Span65.9 ft (20.1 m)
Deck Width34.1 ft (10.4 m)
Deck Area411.8 sq m
Main Spans2
Year Built1949

Traffic

Avg Daily Traffic3,889 (2023)
Truck Traffic20%
Lanes On Bridge2

Inspection & Ownership

Last Inspection723
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Structure NumberI00090509+05611

Nearby Bridges

IRR - I 90 over Little Bighorn River 0.0 mi Fair Bala ST over Little Bighorn River 069 0.1 mi Fair IRR - I 90 over Int Crow Agency 0.3 mi Fair IRR - I 90 over Int Crow Agency 0.3 mi Fair IRR BIA RTE 6 over Little Bighorn River 0.6 mi Good IRR - US 212 over Int Custer Batlfld I 90 1.3 mi Fair IRR - Frontage 325 over Little Bighorn River 075 2.0 mi Fair IRR - I 90 over Little Bighorn River 2.0 mi Fair IRR - I 90 over Little Bighorn River 2.0 mi Fair IRR - Frontage 315 over Little Bighorn River 002 2.0 mi Fair