I 90 over Jefferson River Overflow

Fair Condition57 years old8,575 vehicles/day

Location

StateMontana
CountyGallatin
LocationThree Forks
CarriesI 90
CrossesJefferson River Overflow
Coordinates45.90531, -111.54340

Condition Ratings

Overall ConditionFair
Deck6 (Satisfactory)
Superstructure7 (Good)
Substructure6 (Satisfactory)
Channel/Waterway8 (Very Good)
Scour Critical5 — Stable for scour

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length254.9 ft (77.7 m)
Max Span69.9 ft (21.3 m)
Deck Width41.0 ft (12.5 m)
Deck Area971.2 sq m
Main Spans4
Year Built1969

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+08261

Nearby Bridges

I 90 over Jefferson River Overflow 0.0 mi Fair I 90 over Abandoned Rr 0.1 mi Fair I 90 over Abandoned Rr 0.1 mi Poor I 90 over Jefferson River 0.4 mi Good I 90 over Jefferson River 0.4 mi Good Old Town RD over Jefferson River 063 0.4 mi Poor S 2 over E Three Forks Int I 90 0.5 mi Fair Old Town RD over Jefferson River 004 0.6 mi Poor S 205-frontage RD over Madison River 0.9 mi Fair I 90 over Madison River-rr 1.0 mi Fair