GREEN LAKE SANITARY DISTRICT: RES-Green Lake Carp Barrier Project
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Purpose

This project will install two carp barriers at key locations tributary to Green Lake. Both areas to be protected are deep water marshes that flow through channel constrictions (bridges) into Green lake. These marsh areas have historically supported carp activity and recruitment. Each barrier will be constructed to allow boat passage yet prevent carp movement. One barrier will be installed at CTH "A" on the east end, the 2nd barrier at CTH "K" (also known as County Park Marsh/Wurches Creek) on the southwest corner of the lake. The barriers will prevent carp migration and spawning in critical habitat areas flowing into the main basin of Green Lake. By retarding carp activity in the very shallow and broad tributary areas at these locations we expect the following benefits realized: 1) Aquatic plant growth will be enhanced in density and areal coverage as a result of the prevention of sediment resuspension and plant root disruption attributable to carp; 2) Water quality in the protected marsh will improve; better clarity, less suspended material in the water of the deepwater marsh areas. It is likely that more deposition will occur within the marsh zone due to improved retention of solids; 3) Water quality of the lake (within the mixing zone of the tributary and ultimately the lake itself) will improve due to lower loadings of suspended materials and nutrients; 4) Ducks, herons, egrets, raptors and furbearing animal use will increase. In one of the locations carp will be trapped by an existing trap setup located adjacent to the barrier. The barriers will be constructed of vertical iron bars with a moveable gate that would allow boat passage and fish passage during critical spawning periods. Maintenance will be conducted by the Sanitary District staff ( not part of the grant dollar request). The final design would be made available to other projects needing designs.

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Lakes Grant
Lake Protection Grant
LPT-194-03
2002
Complete
 
Activities & Recommendations
Grant Awarded
This project will install two carp barriers at key locations tributary to Green Lake. Both areas to be protected are deep water marshes that flow through channel constrictions (bridges) into Green lake. These marsh areas have historically supported carp activity and recruitment. Each barrier will be constructed to allow boat passage yet prevent carp movement. One barrier will be installed at CTH "A" on the east end, the 2nd barrier at CTH "K" (also known as County Park Marsh/Wurches Creek) on the southwest corner of the lake.
Fish Management, Access
This project will install two carp barriers at key locations tributary to Green Lake. Both areas to be protected are deep water marshes that flow through channel constrictions (bridges) into Green lake. These marsh areas have historically supported carp activity and recruitment. Each barrier will be constructed to allow boat passage yet prevent carp movement.
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