Iowa DNR
Iowa DNR Fish Kill Database

Fish Kill Event - Unnamed Tributary to Fourmile Creek

Ankeny

Event ID
1001
Date of Kill
8/13/2020
Waterbody Type
River/Stream
Cause Origin
Anthropogenic
Cause
Organic Material
Mode
Dumping
Magnitude
3 (1001 - 5000 fish killed)
Estimated Fish Killed
2,056
Kill Length
0.66 miles
Valuation
$18,241.36
Investigation Expenses
$688.62
County
Polk
ESD Field Office
FO 5
Fisheries Office
Boone Research Station
LongDD
-93.58951
LatDD
41.74347
Created Date
8/17/2020 11:26:51 AM
Last Update
8/17/2020 11:26:51 AM
For more information about this fish kill event, contact the Field Office or Fisheries Office listed above.
Impacted Assessment Segments
Lat/Long uses WGS84 datum
Onsite Comments

The fish kill occurred on a tributary to Fourmile Creek within the City of Ankeny in Central PolkCounty. The impacted reach spanned from North Trilein Drive, downstream to just west of the Interstate 35culvert. The killed reach was 3,489 feet, from 15T 450982 4621463 to 15T 451915 4621310.

Hy-Vee Supermarket, located at 410 N Ankeny Blvd., disposed approximately 800 gallons of milkdown a storm drain. The milk traveled through the storm sewer to a tributary to Fourmile Creek. High biologicaloxygen demand to break down the milk caused low dissolved oxygen in the stream, resulting in the fish kill.