Structure 33620-03089 · Louisa County, IA

Levee over Lake Odessa Inlet

Carries Levee over Lake Odessa Inlet, Sec 5 T74n R2w.

Overall conditionGood

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

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructuresets the rating7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT34 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

34 ft end to end, longest span 8 ft. 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 or the layout of the shorter spans, so those are drawn as typical for a multi-beam bridge.

Built199630 years old
Length34.1 ft10.4 m
Daily traffic100counted 2023
Last inspectedAugust 2023every 24 months

Location

StateIowa
CountyLouisa
LocationSec 5 T74n R2w
CarriesLevee
CrossesLake Odessa Inlet
Coordinates41.23267, -91.11100

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length34.1 ft (10.4 m)
Max Span7.9 ft (2.4 m)
Deck Width12.1 ft (3.7 m)
Deck Area38.5 sq m
Main Spans4
Year Built1996

Traffic

Avg Daily Traffic100 (2023)
Lanes On Bridge1

Inspection & Ownership

Last InspectionAugust 2023
Inspection FrequencyEvery 24 months
OwnerCode 63
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number000033620-03089

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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