Structure 6799 · Menominee County, MI

M-35 over Big Cedar River

Carries M-35 over Big Cedar River, 0.2 Mi N Of Cedar RD.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructuresets the rating6/9 · Satisfactory
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT349 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 6/9

349 ft end to end, longest span 70 ft: about 5 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.

Built195274 years old
Length348.8 ft106.3 m
Daily traffic2,900counted 2017
Last inspectedSeptember 2024every 24 months

Location

StateMichigan
CountyMenominee
Location0.2 Mi N Of Cedar RD
CarriesM-35
CrossesBig Cedar River
Coordinates45.41421, -87.34981

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length348.8 ft (106.3 m)
Max Span69.9 ft (21.3 m)
Deck Width39.7 ft (12.1 m)
Deck Area1286.2 sq m
Main Spans5
Year Built1952

Traffic

Avg Daily Traffic2,900 (2017)
Truck Traffic17%
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical3 — Scour critical
Structure Number000000000006799

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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