Structure 871 · Berrien County, MI

M-139 over Conrail (abn) & Ox Creek

Carries M-139 over Conrail (abn) & Ox Creek, SE Lts Of Benton Harbor.

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 overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT672 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 6/9

672 ft end to end, longest span 87 ft: about 1.9 football fields. 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.

Built1936rebuilt 1990
Length671.9 ft204.8 m
Daily traffic10,503counted 2007
Last inspectedJune 2024every 24 months

Location

StateMichigan
CountyBerrien
LocationSE Lts Of Benton Harbor
CarriesM-139
CrossesConrail (abn) & Ox Creek
Coordinates42.09946, -86.43447

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length671.9 ft (204.8 m)
Max Span86.9 ft (26.5 m)
Deck Width60.7 ft (18.5 m)
Deck Area3788.8 sq m
Main Spans9
Year Built1936 (reconstructed 1990)

Traffic

Avg Daily Traffic10,503 (2007)
Truck Traffic9%
Lanes On Bridge4

Inspection & Ownership

Last InspectionJune 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number000000000000871

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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