I 90 over Jefferson River

Good Condition58 years old8,575 vehicles/day

Location

StateMontana
CountyGallatin
Location0.6m W Three Forks
CarriesI 90
CrossesJefferson River
Coordinates45.91013, -111.54720

Condition Ratings

Overall ConditionGood
Deck7 (Good)
Superstructure8 (Very Good)
Substructure7 (Good)
Channel/Waterway6 (Satisfactory)
Scour Critical8 — Stable, low risk

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length274.0 ft (83.5 m)
Max Span91.5 ft (27.9 m)
Deck Width41.0 ft (12.5 m)
Deck Area1043.8 sq m
Main Spans3
Year Built1968

Traffic

Avg Daily Traffic8,575 (2023)
Truck Traffic14%
Lanes On Bridge2

Inspection & Ownership

Last Inspection724
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Structure NumberI00090277+04472

Nearby Bridges

I 90 over Jefferson River 0.0 mi Good Old Town RD over Jefferson River 004 0.3 mi Poor I 90 over Jefferson River Overflow 0.4 mi Fair I 90 over Jefferson River Overflow 0.4 mi Fair Old Town RD over Jefferson River 063 0.4 mi Poor I 90 over Abandoned Rr 0.5 mi Poor I 90 over Abandoned Rr 0.5 mi Fair S 2 over E Three Forks Int I 90 0.9 mi Fair S 205-frontage RD over Madison River 1.2 mi Fair I 90 over Madison River-rr 1.3 mi Fair