Structure 16658400000000 · Cook County, IL

Ms-6001 Up Lv Term over Ms-6001 Lw Lv Term

Carries Ms-6001 Up Lv Term over Ms-6001 Lw Lv Term, T2(spans 15x-24)ord.

Overall conditionFair

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

How ratings work
Deck6/9 · Satisfactory
Superstructure6/9 · Satisfactory
Substructuresets the rating5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT922 FT OVERALL200 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 5/9 · sets the rating

922 ft end to end, longest span 61 ft: about 2.6 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.

Built1960rebuilt 2001
Length921.9 ft281 m
Daily traffic31,800counted 2018
Last inspectedMay 2023every 24 months

Location

StateIllinois
CountyCook
LocationT2(spans 15x-24)ord
CarriesMs-6001 Up Lv Term
CrossesMs-6001 Lw Lv Term
Coordinates41.97681, -87.90475

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length921.9 ft (281 m)
Max Span60.7 ft (18.5 m)
Deck Width113.2 ft (34.5 m)
Deck Area9694.5 sq m
Main Spans16
Year Built1960 (reconstructed 2001)

Traffic

Avg Daily Traffic31,800 (2018)
Truck Traffic9%
Lanes On Bridge6
Lanes Under Bridge5

Inspection & Ownership

Last InspectionMay 2023
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number016658400000000

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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