Structure 10138 · St. Clair County, MI

ST Clair HWY over Belle River

Carries ST Clair HWY over Belle River, Sec. 6-7 China Twp.

Overall conditionGood

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

How ratings work
Deck8/9 · Very Good
Superstructure8/9 · Very Good
Substructuresets the rating7/9 · Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT165 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 8/9Substructure 7/9 · sets the rating

165 ft end to end: 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 through truss.

Built20188 years old
Length165.0 ft50.3 m
Daily traffic2,173counted 2016
Last inspectedNovember 2024every 24 months

Location

StateMichigan
CountySt. Clair
LocationSec. 6-7 China Twp
CarriesST Clair HWY
CrossesBelle River
Coordinates42.79973, -82.59490

Physical Characteristics

MaterialSteel
DesignTruss - Thru
Total Length165.0 ft (50.3 m)
Max Span157.5 ft (48 m)
Deck Width38.7 ft (11.8 m)
Deck Area593.5 sq m
Main Spans1
Year Built2018

Traffic

Avg Daily Traffic2,173 (2016)
Truck Traffic9%
Lanes On Bridge2

Inspection & Ownership

Last InspectionNovember 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number000000000010138

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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