Structure 81605000000000 · Rock Island County, IL

34th AVE over Stream & Parking Rmp

Carries 34th AVE over Stream & Parking Rmp, Blackhawk Campus.

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
SEMI-TRUCK · 72 FT292 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 6/9

292 ft end to end, longest span 115 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.

Built1967rebuilt 2007
Length291.7 ft88.9 m
Daily traffic3,250counted 2020
Last inspectedOctober 2024every 24 months

Location

StateIllinois
CountyRock Island
LocationBlackhawk Campus
Carries34th AVE
CrossesStream & Parking Rmp
Coordinates41.47830, -90.46124

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length291.7 ft (88.9 m)
Max Span115.2 ft (35.1 m)
Deck Width51.8 ft (15.8 m)
Deck Area1404.6 sq m
Main Spans3
Year Built1967 (reconstructed 2007)

Traffic

Avg Daily Traffic3,250 (2020)
Truck Traffic2%
Lanes On Bridge2

Inspection & Ownership

Last InspectionOctober 2024
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number081605000000000

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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