Structure 9159 · Saginaw County, MI

King RD over I-75

Carries King RD over I-75, 2.6 Mi SE Of M-46.

Overall conditionGood

Set by its lowest-rated component: Deck and Substructure at 8 of 9.

How ratings work
Decksets the rating8/9 · Very Good
Superstructure9/9 · Excellent
Substructuresets the rating8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT209 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9 · sets the ratingSuperstructure 9/9Substructure 8/9 · sets the rating

209 ft end to end, longest span 102 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.

Built201511 years old
Length209.0 ft63.7 m
Daily traffic1,921counted 1996
Last inspectedSeptember 2023every 24 months

Location

StateMichigan
CountySaginaw
Location2.6 Mi SE Of M-46
CarriesKing RD
CrossesI-75
Coordinates43.37805, -83.87570

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length209.0 ft (63.7 m)
Max Span102.4 ft (31.2 m)
Deck Width43.3 ft (13.2 m)
Deck Area840.8 sq m
Main Spans2
Year Built2015

Traffic

Avg Daily Traffic1,921 (1996)
Truck Traffic3%
Lanes On Bridge2
Lanes Under Bridge8

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 Number000000000009159

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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