Structure 194 · Allegan County, MI

58th Street over Kalamazoo River

Carries 58th Street over Kalamazoo River, Approx 0.6 Mi S 132 AVE.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructuresets the rating5/9 · Fair
Substructuresets the rating5/9 · Fair
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT321 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 5/9 · sets the ratingSubstructure 5/9 · sets the rating

321 ft end to end, longest span 64 ft: about 4 semi-trucks nose to tail. Lengths and the semi-truck 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 box-beam bridge.

Built197452 years old
Length320.9 ft97.8 m
Daily traffic6,042counted 2010
Last inspectedOctober 2023every 24 months

Location

StateMichigan
CountyAllegan
LocationApprox 0.6 Mi S 132 AVE
Carries58th Street
CrossesKalamazoo River
Coordinates42.64391, -86.11601

Physical Characteristics

MaterialPrestressed Concrete
DesignBox Beam - Single/Spread
Total Length320.9 ft (97.8 m)
Max Span64.0 ft (19.5 m)
Deck Width36.4 ft (11.1 m)
Deck Area1085.6 sq m
Main Spans5
Year Built1974

Traffic

Avg Daily Traffic6,042 (2010)
Truck Traffic7%
Lanes On Bridge2

Inspection & Ownership

Last InspectionOctober 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number000000000000194

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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