Structure 90703000033856 · Iron County, MI

Fdr3350 over Bush Creek

Carries Fdr3350 over Bush Creek, 19 Mi E 9 Mi N Watersmeet.

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
CAR · 15 FT31 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 8/9Substructure 7/9 · sets the rating

31 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 slab bridge.

Built20215 years old
Length30.5 ft9.3 m
Daily traffic100counted 2020
Last inspectedJuly 2024every 24 months

Location

StateMichigan
CountyIron
Location19 Mi E 9 Mi N Watersmeet
CarriesFdr3350
CrossesBush Creek
Coordinates46.25895, -88.82775

Physical Characteristics

MaterialWood or Timber
DesignSlab
Total Length30.5 ft (9.3 m)
Max Span29.2 ft (8.9 m)
Deck Width18.0 ft (5.5 m)
Deck Area51.1 sq m
Main Spans1
Year Built2021

Traffic

Avg Daily Traffic100 (2020)
Truck Traffic1%
Lanes On Bridge1

Inspection & Ownership

Last InspectionJuly 2024
Inspection FrequencyEvery 24 months
OwnerU.S. Forest Service
Historical SignificanceHistorical significance is not determined
Scour Critical5 — Stable for scour
Structure Number090703000033856

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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