Structure 98362000000000 · Whiteside County, IL

Lake Road (tr 31) over Branch Rock Creek

Carries Lake Road (tr 31) over Branch Rock Creek, 5 Mi. N. Morrison.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructuresets the rating6/9 · Satisfactory
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
24 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 6/9

24 ft end to end. Lengths are drawn to scale; at this length a semi-truck would be a speck. 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.

Built199432 years old
Length24.0 ft7.3 m
Daily traffic75counted 2021
Last inspectedSeptember 2024every 24 months

Location

StateIllinois
CountyWhiteside
Location5 Mi. N. Morrison
CarriesLake Road (tr 31)
CrossesBranch Rock Creek
Coordinates41.88994, -89.94449

Physical Characteristics

MaterialConcrete
DesignChannel Beam
Total Length24.0 ft (7.3 m)
Max Span21.3 ft (6.5 m)
Deck Width25.9 ft (7.9 m)
Deck Area57.7 sq m
Main Spans1
Year Built1994

Traffic

Avg Daily Traffic75 (2021)
Truck Traffic13%
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2024
Inspection FrequencyEvery 24 months
OwnerTown/Township Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number098362000000000

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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