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Green Castle Lake Draw Down

by tkrough last modified 2015-02-23 02:26 PM

Public Notice, Green Castle Lake Draw Down

Public Notice, Green Castle Lake Draw Down

Beginning the fall of 2012 Green Castle Lake will be drawn down 9’ from full pool level. The purpose of the draw down is to remove the presence of Common Carp that have continually degraded the fisheries of the lake since their discovery approximately 10 years ago. In late summer 2012 Iowa DNR Fisheries Biologists again surveyed the lake through electro shocking and determined up to half the live weight of fish is now consistent of Common Carp. The behavior of this invasive non-native fish species causes increased turbidity of the water and out competes with more desirable species of game fish.  During the survey in 2012 some game fish were found to still be present but not at population levels or sizes that indicate a healthy fisheries. By reducing the lake level, remaining fish will be confined to a smaller body of water making it easier for those fishing to catch. Regular Iowa State fishing rules and regulations are still in effect. However, the MCCB encourages anglers to keep and utilize all fish caught of legal size and limits. Catch and release is not advised because eventually all the fish need to be removed from the lake. The lake is expected to be lowered for approximately two years so the rough fish can be completely eliminated, silt removal work can be completed, and additional fish habitat structure can be added. The most efficient way to remove the Carp is to draw down the lake level and eventually remove all fish in the lake and begin again by restocking desirable species. Questions can be directed to the Marshall County Conservation Board offices at 641-752-5490.

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