Structure 2525 · Genesee County, MI

I-75 To I-69 Rmp B over Gtw Rr &i-75

Carries I-75 To I-69 Rmp B over Gtw Rr &i-75, NB I-75 Rmp To WB I-69.

Overall conditionPoor

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

How ratings work
Decksets the rating3/9 · Serious
Superstructure4/9 · Poor
Substructure5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT587 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 3/9 · sets the ratingSuperstructure 4/9Substructure 5/9

587 ft end to end, longest span 145 ft: about 1.6 football fields. 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.

Built196957 years old
Length586.9 ft178.9 m
Daily traffic9,590counted 2019
Last inspectedOctober 2024every 12 months

Location

StateMichigan
CountyGenesee
LocationNB I-75 Rmp To WB I-69
CarriesI-75 To I-69 Rmp B
CrossesGtw Rr &i-75
Coordinates42.98281, -83.73100

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length586.9 ft (178.9 m)
Max Span145.0 ft (44.2 m)
Deck Width35.1 ft (10.7 m)
Deck Area1914.2 sq m
Main Spans8
Year Built1969

Traffic

Avg Daily Traffic9,590 (2019)
Truck Traffic8%
Lanes On Bridge2
Lanes Under Bridge6

Inspection & Ownership

Last InspectionOctober 2024
Inspection FrequencyEvery 12 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number000000000002525

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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