I 90 over Madison River-rr

Fair Condition62 years old9,762 vehicles/day

Location

StateMontana
CountyGallatin
Location0.6m E Three Forks
CarriesI 90
CrossesMadison River-rr
Coordinates45.89876, -111.52447

Condition Ratings

Overall ConditionFair
Deck7 (Good)
Superstructure7 (Good)
Substructure6 (Satisfactory)
Channel/Waterway6 (Satisfactory)
Scour Critical7 — Countermeasures installed

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length735.9 ft (224.3 m)
Max Span71.5 ft (21.8 m)
Deck Width31.5 ft (9.6 m)
Deck Area2153.3 sq m
Main Spans11
Year Built1964

Traffic

Avg Daily Traffic9,762 (2023)
Truck Traffic12%
Lanes On Bridge2

Inspection & Ownership

Last Inspection125
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Structure NumberI00090278+08571

Nearby Bridges

I 90 over Madison River-rr 0.0 mi Fair S 205-frontage RD over Madison River 0.2 mi Fair S 2 over E Three Forks Int I 90 0.5 mi Fair S 205-frontage RD over Mid Fork Madison River 0.6 mi Fair I 90 over Darlington Ditch 0.7 mi Fair I 90 over Darlington Ditch 0.7 mi Fair I 90 over Abandoned Rr 0.9 mi Poor I 90 over Abandoned Rr 0.9 mi Fair I 90 over Jefferson River Overflow 1.0 mi Fair I 90 over Jefferson River Overflow 1.0 mi Fair