Structure 700390 · Pottawattamie County, IA

I80us6 WB To I29nb over II Rr & Drainage Ditch

Carries I80us6 WB To I29nb over II Rr & Drainage Ditch, 4.0 Mi. E Of NE Line.

Overall conditionGood

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

How ratings work
Decksets the rating7/9 · Good
Superstructure8/9 · Very Good
Substructure8/9 · Very Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT1,193 FT OVERALL250 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9 · sets the ratingSuperstructure 8/9Substructure 8/9

1,193 ft end to end, longest span 269 ft: about 3.3 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.

Built20179 years old
Length1192.9 ft363.6 m
Daily traffic1,450counted 2022
Last inspectedOctober 2023every 24 months

Location

StateIowa
CountyPottawattamie
Location4.0 Mi. E Of NE Line
CarriesI80us6 WB To I29nb
CrossesII Rr & Drainage Ditch
Coordinates41.23218, -95.83763

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length1192.9 ft (363.6 m)
Max Span268.7 ft (81.9 m)
Deck Width45.3 ft (13.8 m)
Deck Area5017.7 sq m
Main Spans6
Year Built2017

Traffic

Avg Daily Traffic1,450 (2022)
Truck Traffic27%
Lanes On Bridge2

Inspection & Ownership

Last InspectionOctober 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number000000000700390

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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