Structure S00241002+00311 · Blaine County, MT

Turner RD over Buckley Coulee

Carries Turner RD over Buckley Coulee, 1m N Harlem.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating5/9 · Fair
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT58 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 5/9 · sets the rating

58 ft end to end, longest span 19 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 multi-beam bridge.

Built194086 years old
Length58.1 ft17.7 m
Daily traffic399counted 2023
Last inspectedOctober 2023every 24 months

Location

StateMontana
CountyBlaine
Location1m N Harlem
CarriesTurner RD
CrossesBuckley Coulee
Coordinates48.54601, -108.77798

Physical Characteristics

MaterialWood or Timber
DesignStringer/Multi-beam
Total Length58.1 ft (17.7 m)
Max Span19.0 ft (5.8 m)
Deck Width25.9 ft (7.9 m)
Deck Area139.8 sq m
Main Spans3
Year Built1940

Traffic

Avg Daily Traffic399 (2023)
Truck Traffic8%
Lanes On Bridge2

Inspection & Ownership

Last InspectionOctober 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure NumberS00241002+00311

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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