Fish Kill Event - Swan Lake

Carroll

Event ID: 893
Date of Kill: 8/15/2015
Waterbody Type: Lake
Cause Origin: Natural
Cause: Environmental
Mode: N/A
Magnitude: 3 (1001 - 5000 fish killed)
County: Carroll
ESD Field Office: FO 4
Fisheries Office: Black Hawk Lake Office
LongDD: -94.84509
LatDD: 42.04135
Created Date: 10/23/2015 1:24:00 PM
Last Update: 8/5/2019 12:37:41 PM

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 appears to have been caused by a large diurnal swing in dissolved oxygen levels that dropped to lethal levels likely sometime during the night or early morning hours.Fisheries staff found thousands of dead fish along the shoreline, with the majority of fish concentrated along the northern part of the lake. Dead bluegill, crappie, largemouth bass, channel catfish, yellow bass, and grass carp were observed.