Structure 71006500000000 · Ogle County, IL

Ivy RD over I-39 & US 51

Carries Ivy RD over I-39 & US 51, 2.5 Mi N Of Ill 64.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructuresets the rating6/9 · Satisfactory
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT258 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9 · sets the ratingSubstructure 7/9

258 ft end to end, longest span 105 ft: about 4 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 multi-beam bridge.

Built198046 years old
Length257.9 ft78.6 m
Daily traffic35counted 2022
Last inspectedFebruary 2023every 24 months

Location

StateIllinois
CountyOgle
Location2.5 Mi N Of Ill 64
CarriesIvy RD
CrossesI-39 & US 51
Coordinates42.04337, -89.02070

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length257.9 ft (78.6 m)
Max Span105.0 ft (32 m)
Deck Width29.9 ft (9.1 m)
Deck Area715.3 sq m
Main Spans2
Year Built1980

Traffic

Avg Daily Traffic35 (2022)
Truck Traffic34%
Lanes On Bridge2
Lanes Under Bridge4

Inspection & Ownership

Last InspectionFebruary 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number071006500000000

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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