Structure 4771 · Kent County, MI

I-196 EB M-21 EB over Grand Rapids Eastern Rr

Carries I-196 EB M-21 EB over Grand Rapids Eastern Rr, In Grand Rapids.

Overall conditionFair

Set by its lowest-rated component: Deck at 6 of 9.

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure7/9 · Good
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT246 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 7/9

246 ft end to end, longest span 106 ft: 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.

Built1964rebuilt 2006
Length246.1 ft75 m
Daily traffic31,051counted 2007
Last inspectedSeptember 2023every 24 months

Location

StateMichigan
CountyKent
LocationIn Grand Rapids
CarriesI-196 EB M-21 EB
CrossesGrand Rapids Eastern Rr
Coordinates42.97247, -85.65358

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length246.1 ft (75 m)
Max Span106.0 ft (32.3 m)
Deck Width73.2 ft (22.3 m)
Deck Area1672.5 sq m
Main Spans3
Year Built1964 (reconstructed 2006)

Traffic

Avg Daily Traffic31,051 (2007)
Truck Traffic9%
Lanes On Bridge3

Inspection & Ownership

Last InspectionSeptember 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number000000000004771

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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