Structure C202 · Big Horn County, MT

IRR BIA RTE 14 over Big Shoulder Creek

Carries IRR BIA RTE 14 over Big Shoulder Creek, 7.2km South Of Crow Agncy.

Overall conditionFair

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

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

Elevation

Side view, colored by inspection rating
20 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9Superstructure 5/9Substructure 5/9

20 ft end to end. Lengths are drawn to scale; at this length a semi-truck would be a speck. 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.

Built196363 years old
Length20.3 ft6.2 m
Daily traffic440counted 2024
Last inspectedJune 2024every 24 months

Location

StateMontana
CountyBig Horn
Location7.2km South Of Crow Agncy
CarriesIRR BIA RTE 14
CrossesBig Shoulder Creek
Coordinates45.54975, -107.43769

Physical Characteristics

MaterialWood or Timber
DesignStringer/Multi-beam
Total Length20.3 ft (6.2 m)
Max Span19.0 ft (5.8 m)
Deck Width23.0 ft (7 m)
Deck Area43.4 sq m
Main Spans1
Year Built1963

Traffic

Avg Daily Traffic440 (2024)
Truck Traffic10%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJune 2024
Inspection FrequencyEvery 24 months
OwnerBureau of Indian Affairs
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number00000000000C202

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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