I 90 over Darlington Ditch

Fair Condition63 years old9,762 vehicles/day

Location

StateMontana
CountyGallatin
Location1.9m E Three Forks
CarriesI 90
CrossesDarlington Ditch
Coordinates45.89777, -111.51049

Condition Ratings

Overall ConditionFair
Deck7 (Good)
Superstructure7 (Good)
Substructure6 (Satisfactory)
Channel/Waterway8 (Very Good)
Scour Critical5 — Stable for scour

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length144.0 ft (43.9 m)
Max Span49.9 ft (15.2 m)
Deck Width41.3 ft (12.6 m)
Deck Area553.1 sq m
Main Spans3
Year Built1963

Traffic

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

Inspection & Ownership

Last Inspection324
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Structure NumberI00090279+05342

Nearby Bridges

I 90 over Darlington Ditch 0.0 mi Fair S 205-frontage RD over Mid Fork Madison River 0.2 mi Fair I 90 over Madison River Overflow 0.5 mi Fair I 90 over Madison River Overflow 0.5 mi Fair I 90 over Madison River-rr 0.7 mi Fair I 90 over Madison River-rr 0.7 mi Fair S 205-frontage RD over Madison River 0.8 mi Fair I 90 over Madison Road 0.8 mi Fair I 90 over Madison Road 0.8 mi Fair S 2 over E Three Forks Int I 90 1.2 mi Fair