Structure 280921 · Polk County, IA

SW 42nd ST over Frink Creek

Carries SW 42nd ST over Frink Creek, 078243000.

Overall conditionFair

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

How ratings work
Culvertsets the rating5/9 · Fair
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT30 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 5/9

A culvert 30 ft across with 2 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.

Built197650 years old
Length29.9 ft9.1 m
Daily traffic121counted 2022
Last inspectedJuly 2023every 24 months

Location

StateIowa
CountyPolk
Location078243000
CarriesSW 42nd ST
CrossesFrink Creek
Coordinates41.52911, -93.67426

Physical Characteristics

MaterialConcrete Continuous
DesignCulvert
Total Length29.9 ft (9.1 m)
Max Span9.8 ft (3 m)
Deck Area77.3 sq m
Main Spans2
Year Built1976

Traffic

Avg Daily Traffic121 (2022)
Truck Traffic3%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJuly 2023
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number000000000280921

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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