Structure 11404000000154 · Lincoln County, MT

746 Vinal Lake Rd. over Vinal Creek

Carries 746 Vinal Lake Rd. over Vinal Creek, Vinal Creek.

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 overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT51 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 8/9Substructure 7/9 · sets the rating

51 ft end to end. 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.

Built198046 years old
Length51.2 ft15.6 m
Daily traffic50counted 1995
Last inspectedAugust 2021every 48 months

Location

StateMontana
CountyLincoln
LocationVinal Creek
Carries746 Vinal Lake Rd.
CrossesVinal Creek
Coordinates48.85282, -115.65172

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length51.2 ft (15.6 m)
Max Span49.9 ft (15.2 m)
Deck Width22.0 ft (6.7 m)
Deck Area104.5 sq m
Main Spans1
Year Built1980

Traffic

Avg Daily Traffic50 (1995)
Lanes On Bridge1

Inspection & Ownership

Last InspectionAugust 2021
Inspection FrequencyEvery 48 months
OwnerU.S. Forest Service
Historical SignificanceHistorical significance is not determined
Scour Critical5 — Stable for scour
Structure Number011404000000154

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.

Nearby Bridges