Structure 9742 · Shiawassee County, MI

I-69 EB over Cn Rr & Reed RD

Carries I-69 EB over Cn Rr & Reed RD, 0.6 Mi SW Of M-71.

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 FT301 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9Superstructure 4/9 · sets the ratingSubstructure 5/9

301 ft end to end, longest span 52 ft: about 4 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.

Built1961rebuilt 1998
Length301.2 ft91.8 m
Daily traffic13,840counted 2007
Last inspectedAugust 2024every 12 months

Location

StateMichigan
CountyShiawassee
Location0.6 Mi SW Of M-71
CarriesI-69 EB
CrossesCn Rr & Reed RD
Coordinates42.92424, -84.01148

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length301.2 ft (91.8 m)
Max Span51.8 ft (15.8 m)
Deck Width49.2 ft (15 m)
Deck Area1,377 sq m
Main Spans6
Year Built1961 (reconstructed 1998)

Traffic

Avg Daily Traffic13,840 (2007)
Truck Traffic22%
Lanes On Bridge2
Lanes Under Bridge2

Inspection & Ownership

Last InspectionAugust 2024
Inspection FrequencyEvery 12 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number000000000009742

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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