Structure 9616 · Polk County, IA

3rd Street over Big Creek

Carries 3rd Street over Big Creek, 080250100.

Overall conditionGood

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

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

Elevation

Side view, colored by inspection rating
CAR · 15 FT41 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 7/9

A culvert 41 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.

Built198541 years old
Length41.0 ft12.5 m
Daily traffic4,992counted 2022
Last inspectedJune 2024every 48 months

Location

StateIowa
CountyPolk
Location080250100
Carries3rd Street
CrossesBig Creek
Coordinates41.77477, -93.71081

Physical Characteristics

MaterialConcrete Continuous
DesignCulvert
Total Length41.0 ft (12.5 m)
Max Span13.1 ft (4 m)
Deck Area122.5 sq m
Main Spans3
Year Built1985

Traffic

Avg Daily Traffic4,992 (2022)
Truck Traffic5%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJune 2024
Inspection FrequencyEvery 48 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number000000000009616

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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