Structure 45650 · Pottawattamie County, IA

I-80 over Stream

Carries I-80 over Stream, 1.6 Mi. E Of Jct. SR M-47.

Overall conditionFair

Set by its lowest-rated component: Culvert at 5 of 9.

How ratings work
Culvertsets the rating5/9 · Fair
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT40 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 5/9

A culvert 40 ft across with 3 openings. Lengths and the car 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, so those are drawn as typical for a culvert.

Built196561 years old
Length40.0 ft12.2 m
Daily traffic23,600counted 2022
Last inspectedOctober 2023every 24 months

Location

StateIowa
CountyPottawattamie
Location1.6 Mi. E Of Jct. SR M-47
CarriesI-80
CrossesStream
Coordinates41.49748, -95.19093

Physical Characteristics

MaterialConcrete Continuous
DesignCulvert
Total Length40.0 ft (12.2 m)
Max Span12.1 ft (3.7 m)
Deck Area297.7 sq m
Main Spans3
Year Built1965

Traffic

Avg Daily Traffic23,600 (2022)
Truck Traffic41%
Lanes On Bridge4

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 Number000000000045650

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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