Structure 13725 · Houghton County, MI

Hazel Swamp Road over W Br Otter River

Carries Hazel Swamp Road over W Br Otter River, 1.8 Mi N Of N Laird RD.

Overall conditionPoor

Set by its lowest-rated component: Substructure at 3 of 9.

How ratings work
Deck5/9 · Fair
Superstructure5/9 · Fair
Substructuresets the rating3/9 · Serious
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT45 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9Superstructure 5/9Substructure 3/9 · sets the rating

45 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.

Built199729 years old
Length44.9 ft13.7 m
Daily traffic10counted 2013
Last inspectedOctober 2024every 12 months

Location

StateMichigan
CountyHoughton
Location1.8 Mi N Of N Laird RD
CarriesHazel Swamp Road
CrossesW Br Otter River
Coordinates46.81811, -88.71278

Physical Characteristics

MaterialWood or Timber
DesignSlab
Total Length44.9 ft (13.7 m)
Max Span44.0 ft (13.4 m)
Deck Width16.4 ft (5 m)
Deck Area68.5 sq m
Main Spans1
Year Built1997

Traffic

Avg Daily Traffic10 (2013)
Lanes On Bridge1

Inspection & Ownership

Last InspectionOctober 2024
Inspection FrequencyEvery 12 months
OwnerOther Local Agencies
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number000000000013725

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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