Structure 59200900000000 · Macoupin County, IL

Ill 16 over Coop CR Branch

Carries Ill 16 over Coop CR Branch, 0.6mi W Shipman.

Overall conditionFair

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

How ratings work
Culvertsets the rating5/9 · Fair
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
22 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 5/9

A culvert 22 ft across with 2 openings. 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, so those are drawn as typical for a culvert.

Built193294 years old
Length22.3 ft6.8 m
Daily traffic2,200counted 2023
Last inspectedApril 2024every 24 months

Location

StateIllinois
CountyMacoupin
Location0.6mi W Shipman
CarriesIll 16
CrossesCoop CR Branch
Coordinates39.11686, -90.06596

Physical Characteristics

MaterialConcrete
DesignCulvert
Total Length22.3 ft (6.8 m)
Max Span9.8 ft (3 m)
Deck Area83.0 sq m
Main Spans2
Year Built1932

Traffic

Avg Daily Traffic2,200 (2023)
Truck Traffic13%
Lanes On Bridge2

Inspection & Ownership

Last InspectionApril 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number059200900000000

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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