Structure 5495 · Leelanau County, MI

M-204|philip ST over Lake Leelanau Narrows

Carries M-204|philip ST over Lake Leelanau Narrows, Lake Leelanau.

Overall conditionFair

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

How ratings work
Deck8/9 · Very Good
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 FT170 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 6/9 · sets the ratingSubstructure 6/9 · sets the rating

170 ft end to end, longest span 59 ft: about 2 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.

Built1939rebuilt 2020
Length169.9 ft51.8 m
Daily traffic4,650counted 2020
Last inspectedJune 2023every 24 months

Location

StateMichigan
CountyLeelanau
LocationLake Leelanau
CarriesM-204|philip ST
CrossesLake Leelanau Narrows
Coordinates44.98144, -85.71159

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length169.9 ft (51.8 m)
Max Span59.1 ft (18 m)
Deck Width43.0 ft (13.1 m)
Deck Area678.6 sq m
Main Spans3
Year Built1939 (reconstructed 2020)

Traffic

Avg Daily Traffic4,650 (2020)
Truck Traffic2%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJune 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is on the National Register of Historic Places
Scour Critical8 — Stable, low risk
Structure Number000000000005495

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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