Structure 27318900000000 · Ford County, IL

Tr 99 Drummer over Dickerson Slough

Carries Tr 99 Drummer over Dickerson Slough, 570e 300n.

Overall conditionFair

Set by its lowest-rated component: Substructure at 6 of 9.

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT69 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 6/9 · sets the rating

69 ft end to end, longest span 26 ft. 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 or the layout of the shorter spans, so those are drawn as typical for a slab bridge.

Built196858 years old
Length68.6 ft20.9 m
Daily traffic200counted 2023
Last inspectedMay 2023every 24 months

Location

StateIllinois
CountyFord
Location570e 300n
CarriesTr 99 Drummer
CrossesDickerson Slough
Coordinates40.44221, -88.35194

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length68.6 ft (20.9 m)
Max Span25.9 ft (7.9 m)
Deck Width27.9 ft (8.5 m)
Deck Area177.7 sq m
Main Spans3
Year Built1968

Traffic

Avg Daily Traffic200 (2023)
Truck Traffic23%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMay 2023
Inspection FrequencyEvery 24 months
OwnerTown/Township Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number027318900000000

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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