Structure 3098 · Gratiot County, MI

Us-127 NB over Us-127 Br

Carries Us-127 NB over Us-127 Br, 2.0 Mi S Of ST Louis.

Overall conditionPoor

Set by its lowest-rated component: Superstructure at 4 of 9.

How ratings work
Deck5/9 · Fair
Superstructuresets the rating4/9 · Poor
Substructure5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT143 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9Superstructure 4/9 · sets the ratingSubstructure 5/9

143 ft end to end, longest span 63 ft. 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.

Built1961rebuilt 2004
Length142.7 ft43.5 m
Daily traffic9,181counted 2007
Last inspectedFebruary 2025every 12 months

Location

StateMichigan
CountyGratiot
Location2.0 Mi S Of ST Louis
CarriesUs-127 NB
CrossesUs-127 Br
Coordinates43.37881, -84.60272

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length142.7 ft (43.5 m)
Max Span62.7 ft (19.1 m)
Deck Width58.1 ft (17.7 m)
Deck Area770.0 sq m
Main Spans3
Year Built1961 (reconstructed 2004)

Traffic

Avg Daily Traffic9,181 (2007)
Truck Traffic8%
Lanes On Bridge3
Lanes Under Bridge3

Inspection & Ownership

Last InspectionFebruary 2025
Inspection FrequencyEvery 12 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number000000000003098

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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