Structure 7508 · Montcalm County, MI

Miller Road over Dickerson Creek

Carries Miller Road over Dickerson Creek, 1.20 South Of Co RD 500.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure and Substructure at 7 of 9.

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructuresets the rating7/9 · Good
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
24 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

24 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 slab bridge.

Built198937 years old
Length24.0 ft7.3 m
Daily traffic47counted 2003
Last inspectedMay 2023every 24 months

Location

StateMichigan
CountyMontcalm
Location1.20 South Of Co RD 500
CarriesMiller Road
CrossesDickerson Creek
Coordinates43.12942, -85.17354

Physical Characteristics

MaterialWood or Timber
DesignSlab
Total Length24.0 ft (7.3 m)
Max Span24.0 ft (7.3 m)
Deck Width23.3 ft (7.1 m)
Deck Area51.8 sq m
Main Spans1
Year Built1989

Traffic

Avg Daily Traffic47 (2003)
Lanes On Bridge2

Inspection & Ownership

Last InspectionMay 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number000000000007508

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.

Nearby Bridges