Structure 303210 · Scott County, IA

115th AVE over Wapsipinicon River

Carries 115th AVE over Wapsipinicon River, 080e21204.

Overall conditionPoor

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

How ratings work
Decksets the rating3/9 · Serious
Superstructure6/9 · Satisfactory
Substructure4/9 · Poor
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT642 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 3/9 · sets the ratingSuperstructure 6/9Substructure 4/9

642 ft end to end, longest span 98 ft: about 1.8 football fields. 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.

Built196561 years old
Length642.1 ft195.7 m
Daily traffic750counted 2021
Last inspectedApril 2023every 24 months

Location

StateIowa
CountyScott
Location080e21204
Carries115th AVE
CrossesWapsipinicon River
Coordinates41.75366, -90.67802

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length642.1 ft (195.7 m)
Max Span98.1 ft (29.9 m)
Deck Width29.9 ft (9.1 m)
Deck Area1780.9 sq m
Main Spans7
Year Built1965

Traffic

Avg Daily Traffic750 (2021)
Truck Traffic14%
Lanes On Bridge2

Inspection & Ownership

Last InspectionApril 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number000000000303210

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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