Structure 10747 · Van Buren County, MI

CR 687 over S Br Black River

Carries CR 687 over S Br Black River, 0.6 Mi North Of CR 380.

Overall conditionFair

Set by its lowest-rated component: Substructure at 5 of 9.

How ratings work
Deck7/9 · Good
Superstructure6/9 · Satisfactory
Substructuresets the rating5/9 · Fair
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT70 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9Substructure 5/9 · sets the rating

70 ft end to end. Lengths and the car 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.

Built196561 years old
Length69.9 ft21.3 m
Daily traffic721counted 2004
Last inspectedApril 2024every 24 months

Location

StateMichigan
CountyVan Buren
Location0.6 Mi North Of CR 380
CarriesCR 687
CrossesS Br Black River
Coordinates42.35434, -86.18757

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length69.9 ft (21.3 m)
Max Span65.9 ft (20.1 m)
Deck Width29.9 ft (9.1 m)
Deck Area193.8 sq m
Main Spans1
Year Built1965

Traffic

Avg Daily Traffic721 (2004)
Truck Traffic2%
Lanes On Bridge2

Inspection & Ownership

Last InspectionApril 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical4 — Foundations need monitoring
Structure Number000000000010747

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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