Structure 78200700000000 · Putnam County, IL

Ill 71 over Drainage Ditch

Carries Ill 71 over Drainage Ditch, 1.14 Mi W Of Ill 89.

Overall conditionGood

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

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

Elevation

Side view, colored by inspection rating
CAR · 15 FT26 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 7/9

A culvert 26 ft across with 2 openings. 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, so those are drawn as typical for a culvert.

Built201511 years old
Length25.9 ft7.9 m
Daily traffic4,700counted 2023
Last inspectedNovember 2021every 48 months

Location

StateIllinois
CountyPutnam
Location1.14 Mi W Of Ill 89
CarriesIll 71
CrossesDrainage Ditch
Coordinates41.25749, -89.22411

Physical Characteristics

MaterialConcrete Continuous
DesignCulvert
Total Length25.9 ft (7.9 m)
Max Span12.5 ft (3.8 m)
Deck Area71.9 sq m
Main Spans2
Year Built2015

Traffic

Avg Daily Traffic4,700 (2023)
Truck Traffic21%
Lanes On Bridge2

Inspection & Ownership

Last InspectionNovember 2021
Inspection FrequencyEvery 48 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number078200700000000

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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