Structure 3348 · Hillsdale County, MI

Elm Road over Mallory Lake Drain

Carries Elm Road over Mallory Lake Drain, 0.1 Mile N Of Egypt Road.

Overall conditionPoor

Set by its lowest-rated component: Superstructure at 2 of 9.

How ratings work
Deck5/9 · Fair
Superstructuresets the rating2/9 · Critical
Substructure4/9 · Poor
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
22 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9Superstructure 2/9 · sets the ratingSubstructure 4/9

22 ft end to end. Lengths are drawn to scale; at this length a semi-truck would be a speck. 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.

Built1910rebuilt 1950
Length22.0 ft6.7 m
Daily traffic46counted 2014
Last inspectedNovember 2023every 24 months

Location

StateMichigan
CountyHillsdale
Location0.1 Mile N Of Egypt Road
CarriesElm Road
CrossesMallory Lake Drain
Coordinates41.82807, -84.38084

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length22.0 ft (6.7 m)
Max Span20.0 ft (6.1 m)
Deck Width20.0 ft (6.1 m)
Deck Area40.9 sq m
Main Spans1
Year Built1910 (reconstructed 1950)

Traffic

Avg Daily Traffic46 (2014)
Lanes On Bridge2

Inspection & Ownership

Last InspectionNovember 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical3 — Scour critical
Structure Number000000000003348

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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