Structure I00094014+08432 · Yellowstone County, MT

I 94 over Int Ballantine

Carries I 94 over Int Ballantine, Ballantine.

Overall conditionFair

Set by its lowest-rated component: Superstructure and Substructure at 6 of 9.

How ratings work
Deck7/9 · Good
Superstructuresets the rating6/9 · Satisfactory
Substructuresets the rating6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT129 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9 · sets the ratingSubstructure 6/9 · sets the rating

129 ft end to end, longest span 47 ft. Lengths and the semi-truck on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a multi-beam bridge.

Built196858 years old
Length128.9 ft39.3 m
Daily traffic2,611counted 2023
Last inspectedOctober 2023every 24 months

Location

StateMontana
CountyYellowstone
LocationBallantine
CarriesI 94
CrossesInt Ballantine
Coordinates45.93967, -108.14922

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length128.9 ft (39.3 m)
Max Span46.6 ft (14.2 m)
Deck Width41.3 ft (12.6 m)
Deck Area495.2 sq m
Main Spans3
Year Built1968

Traffic

Avg Daily Traffic2,611 (2023)
Truck Traffic26%
Lanes On Bridge2
Lanes Under Bridge2

Inspection & Ownership

Last InspectionOctober 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure NumberI00094014+08432

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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