Structure 1257 · Calhoun County, MI

I-94 WB over Kalamazoo River

Carries I-94 WB over Kalamazoo River, 3.7 Mi E Of M-66.

Overall conditionGood

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

How ratings work
Deck9/9 · Excellent
Superstructure8/9 · Very Good
Substructuresets the rating7/9 · Good
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT242 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 9/9Superstructure 8/9Substructure 7/9 · sets the rating

242 ft end to end: about 3 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 multi-beam bridge.

Built20233 years old
Length242.1 ft73.8 m
Daily traffic22,400counted 2010
Last inspectedOctober 2023every 24 months

Location

StateMichigan
CountyCalhoun
Location3.7 Mi E Of M-66
CarriesI-94 WB
CrossesKalamazoo River
Coordinates42.28962, -85.11403

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length242.1 ft (73.8 m)
Max Span234.9 ft (71.6 m)
Deck Width56.4 ft (17.2 m)
Deck Area1269.4 sq m
Main Spans1
Year Built2023

Traffic

Avg Daily Traffic22,400 (2010)
Truck Traffic22%
Lanes On Bridge2

Inspection & Ownership

Last InspectionOctober 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number000000000001257

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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