S 78 over Yellowstone River

Poor Condition69 years old5,017 vehicles/day

Location

StateMontana
CountyStillwater
LocationColumbus
CarriesS 78
CrossesYellowstone River
Coordinates45.62870, -109.25496

Condition Ratings

Overall ConditionPoor
Deck4 (Poor)
Superstructure7 (Good)
Substructure5 (Fair)
Channel/Waterway5 (Fair)
Scour Critical3 — Scour critical

Physical Characteristics

MaterialSteel Continuous
DesignGirder and Floorbeam
Total Length575.8 ft (175.5 m)
Max Span160.1 ft (48.8 m)
Deck Width30.8 ft (9.4 m)
Deck Area1649.7 sq m
Main Spans4
Year Built1957

Traffic

Avg Daily Traffic5,017 (2023)
Truck Traffic3%
Lanes On Bridge2

Inspection & Ownership

Last Inspection823
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Structure NumberP00078046+01371

Nearby Bridges

HWY 10 over Keyser Creek 1.2 mi Fair I 90 over Int Columbus-9th ST N 1.3 mi Fair I 90 over Int Columbus-9th ST N 1.3 mi Fair Centennial RD over Keyser Creek 043 1.4 mi Good Countryman CR RD over Stillwater R Ovflow 002 1.5 mi Fair S 78 over Shane Creek 1.6 mi Fair Countryman CR RD over Stillwater River 003 1.7 mi Fair I 90 over Keyser Creek 1.9 mi Fair I 90 over Keyser Creek 1.9 mi Fair Rapelje RD over Sep Rapelje-i 90 2.1 mi Fair