Structure 9039 · Saginaw County, MI

M-57 over Mistequay Creek

Carries M-57 over Mistequay Creek, 0.6 Mi W Of Genesee Col.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure8/9 · Very Good
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT120 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 8/9Substructure 6/9 · sets the rating

120 ft end to end, longest span 40 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.

Built1940rebuilt 1990
Length120.1 ft36.6 m
Daily traffic5,039counted 2007
Last inspectedJuly 2023every 24 months

Location

StateMichigan
CountySaginaw
Location0.6 Mi W Of Genesee Col
CarriesM-57
CrossesMistequay Creek
Coordinates43.17612, -83.94255

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length120.1 ft (36.6 m)
Max Span40.0 ft (12.2 m)
Deck Width51.2 ft (15.6 m)
Deck Area571.0 sq m
Main Spans3
Year Built1940 (reconstructed 1990)

Traffic

Avg Daily Traffic5,039 (2007)
Truck Traffic10%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJuly 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical3 — Scour critical
Structure Number000000000009039

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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