I 90 over St. Regis River

Fair Condition45 years old4,056 vehicles/day

Location

StateMontana
CountyMineral
Location4.3m W St. Regis
CarriesI 90
CrossesSt. Regis River
Coordinates47.29977, -115.17852

Condition Ratings

Overall ConditionFair
Deck5 (Fair)
Superstructure6 (Satisfactory)
Substructure5 (Fair)
Channel/Waterway7 (Good)
Scour Critical5 — Stable for scour

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length438.0 ft (133.5 m)
Max Span121.1 ft (36.9 m)
Deck Width44.3 ft (13.5 m)
Deck Area1802.2 sq m
Main Spans4
Year Built1981 (reconstructed 2010)

Traffic

Avg Daily Traffic4,056 (2023)
Truck Traffic24%
Lanes On Bridge2

Inspection & Ownership

Last Inspection723
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Structure NumberI00090029+03681

Nearby Bridges

I 90 over St. Regis River 0.0 mi Fair I 90 over St. Regis River 0.2 mi Fair I 90 over St. Regis River 0.2 mi Fair RD 431 over Twomile Creek 0.4 mi Fair RD 431 over ST Regis River 0.5 mi Fair I 90 over Int Two Mile-st Regis R 0.7 mi Fair I 90 over Int Two Mile-st Regis R 0.7 mi Fair I 90 over St. Regis Rvr-int Ramp 0.7 mi Fair I 90 over St. Regis River 1.1 mi Good I 90 EB over St. Regis River 1.9 mi Fair