Structure 10902000000060 · Silver Bow County, MT

No Data Entered over Fish CR

Carries No Data Entered over Fish CR, Past Pigion Creek Cg.

Overall conditionGood

Set by its lowest-rated component: Substructure at 7 of 9.

How ratings work
Deck8/9 · Very Good
Superstructure8/9 · Very Good
Substructuresets the rating7/9 · Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
25 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 8/9Substructure 7/9 · sets the rating

25 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.

Built198640 years old
Length24.6 ft7.5 m
Daily traffic40counted 2018
Last inspectedSeptember 2024every 48 months

Location

StateMontana
CountySilver Bow
LocationPast Pigion Creek Cg
CarriesNo Data Entered
CrossesFish CR
Coordinates45.79474, -112.42420

Physical Characteristics

MaterialWood or Timber
DesignStringer/Multi-beam
Total Length24.6 ft (7.5 m)
Max Span23.0 ft (7 m)
Deck Width16.1 ft (4.9 m)
Deck Area36.8 sq m
Main Spans1
Year Built1986

Traffic

Avg Daily Traffic40 (2018)
Lanes On Bridge1

Inspection & Ownership

Last InspectionSeptember 2024
Inspection FrequencyEvery 48 months
OwnerU.S. Forest Service
Historical SignificanceHistorical significance is not determined
Scour Critical5 — Stable for scour
Structure Number010902000000060

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.