Structure 71334700000000 · Ogle County, IL

Macklin RD over Trib Of Stillman Crk

Carries Macklin RD over Trib Of Stillman Crk, 1.5 Mi W Stilmn Valy.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure at 7 of 9.

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructure8/9 · Very Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT88 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9 · sets the ratingSuperstructure 7/9 · sets the ratingSubstructure 8/9

88 ft end to end, longest span 33 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.

Built201610 years old
Length87.9 ft26.8 m
Daily traffic250counted 2022
Last inspectedSeptember 2023every 48 months

Location

StateIllinois
CountyOgle
Location1.5 Mi W Stilmn Valy
CarriesMacklin RD
CrossesTrib Of Stillman Crk
Coordinates42.10498, -89.21645

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length87.9 ft (26.8 m)
Max Span33.1 ft (10.1 m)
Deck Width34.1 ft (10.4 m)
Deck Area278.7 sq m
Main Spans3
Year Built2016

Traffic

Avg Daily Traffic250 (2022)
Truck Traffic21%
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2023
Inspection FrequencyEvery 48 months
OwnerTown/Township Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number071334700000000

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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