Structure 32450000000000 · Grundy County, IL

Tr-204 Dresden RD over Com.ed.flumes

Carries Tr-204 Dresden RD over Com.ed.flumes, 2 Mi N Pine Bluff RD.

Overall conditionPoor

Set by its lowest-rated component: Superstructure at 2 of 9.

How ratings work
Deck3/9 · Serious
Superstructuresets the rating2/9 · Critical
Substructure4/9 · Poor
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT393 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 3/9Superstructure 2/9 · sets the ratingSubstructure 4/9

393 ft end to end, longest span 29 ft: about 5 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 channel-beam bridge.

Built197551 years old
Length393.4 ft119.9 m
Daily traffic1,400counted 2024
Last inspectedNovember 2023every 24 months

Location

StateIllinois
CountyGrundy
Location2 Mi N Pine Bluff RD
CarriesTr-204 Dresden RD
CrossesCom.ed.flumes
Coordinates41.37213, -88.26838

Physical Characteristics

MaterialConcrete
DesignChannel Beam
Total Length393.4 ft (119.9 m)
Max Span28.9 ft (8.8 m)
Deck Width33.8 ft (10.3 m)
Deck Area1235.0 sq m
Main Spans13
Year Built1975

Traffic

Avg Daily Traffic1,400 (2024)
Truck Traffic6%
Lanes On Bridge2

Inspection & Ownership

Last InspectionNovember 2023
Inspection FrequencyEvery 24 months
OwnerTown/Township Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number032450000000000

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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