Structure 32585600000000 · Grundy County, IL

Tr 155/goodfarm RD over E Fork Mazon River

Carries Tr 155/goodfarm RD over E Fork Mazon River, 1 S South Wilmington.

Overall conditionPoor

Set by its lowest-rated component: Superstructure at 3 of 9.

How ratings work
Deck6/9 · Satisfactory
Superstructuresets the rating3/9 · Serious
Substructure7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT110 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 3/9 · sets the ratingSubstructure 7/9

110 ft end to end, longest span 38 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 channel-beam bridge.

Built199927 years old
Length109.9 ft33.5 m
Daily traffic50counted 2024
Last inspectedOctober 2024every 24 months

Location

StateIllinois
CountyGrundy
Location1 S South Wilmington
CarriesTr 155/goodfarm RD
CrossesE Fork Mazon River
Coordinates41.15744, -88.27292

Physical Characteristics

MaterialConcrete
DesignChannel Beam
Total Length109.9 ft (33.5 m)
Max Span38.1 ft (11.6 m)
Deck Width26.2 ft (8 m)
Deck Area268 sq m
Main Spans3
Year Built1999

Traffic

Avg Daily Traffic50 (2024)
Truck Traffic20%
Lanes On Bridge2

Inspection & Ownership

Last InspectionOctober 2024
Inspection FrequencyEvery 24 months
OwnerTown/Township Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number032585600000000

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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