Iowa DNR
Iowa DNR Fish Kill Database

Fish Kill Event - Little Maquoketa River

Southwest of Graf to northeast of Graf

Event ID
980
Date of Kill
8/9/2019
Waterbody Type
River/Stream
Cause Origin
Unknown
Cause
Unknown
Mode
N/A
Magnitude
6 (25,001 - 50,000 fish killed)
Estimated Fish Killed
33,352
Kill Length
6.36 miles
Valuation
$44,572.12
Investigation Expenses
$2,731.99
County
Dubuque
ESD Field Office
FO 1
Fisheries Office
Manchester Trout Hatchery
LongDD
-90.89713
LatDD
42.48155
Created Date
8/21/2019 9:15:06 AM
Last Update
8/21/2019 9:23:17 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

Unconfirmed cause of kill. Began in the NE ¼ of section 31, T89N, R1E and ending in the SW ¼ of section 15, T89N, R1E. The kill was extensive over 6.3 miles of stream. Water was clear and near base flows at the time of assessment. The kill included numbers of crayfish that were not quantified. One dead field mouse was also noted in the kill area that may have or may not have been associated with the fish kill. Fish had been dead for several days prior to the investigation and species identifications were not possible for some fish carcasses. We identified the following thirteen species in the kill extent:, Bluegill, Redhorse Species, Central Stoneroller, Common Shiner, Creek Chub, Hornyhead Chub, Johnny Darter, Largemouth Bass, Madtom Species, Rock Bass, Smallmouth Bass, Stonecat, and White Sucker. In cases where species could not be determined the value of individuals was set at $0.07, or the lowest valuation of fish provided for this region in AFS Special Publication 30. The fish kill site was determined to be incompletely accessible given terrestrial vegetation at the location, pastured cattle and the extent of the location.