Structure P00013030+08711 · Madison County, MT

US 287 over Indian Creek

Carries US 287 over Indian Creek, 7m S Cameron.

Overall conditionFair

Set by its lowest-rated component: Deck at 5 of 9.

How ratings work
Decksets the rating5/9 · Fair
Superstructure7/9 · Good
Substructure6/9 · Satisfactory
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT85 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 7/9Substructure 6/9

85 ft end to end, longest span 27 ft. Lengths and the car 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 tee-beam bridge.

Built1933rebuilt 1984
Length85.0 ft25.9 m
Daily traffic1,782counted 2023
Last inspectedJuly 2024every 24 months

Location

StateMontana
CountyMadison
Location7m S Cameron
CarriesUS 287
CrossesIndian Creek
Coordinates45.10344, -111.65077

Physical Characteristics

MaterialConcrete
DesignTee Beam
Total Length85.0 ft (25.9 m)
Max Span26.9 ft (8.2 m)
Deck Width42.3 ft (12.9 m)
Deck Area334.1 sq m
Main Spans3
Year Built1933 (reconstructed 1984)

Traffic

Avg Daily Traffic1,782 (2023)
Truck Traffic15%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJuly 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure NumberP00013030+08711

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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