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Lake Koshkonong Project Workshop 3


  1. Lake Koshkonong Project Workshop 3 ������������������ ������������������������������������ ������������������������������ 1. Improve navigation in Lake Koshkonong and on the Rock River 2. Protect and improve wetland habitat and water quality 3. Protect, restore and create fish and wildlife habitat 4. Enhance the value of the Lake in as a recreational destination www.ma-rs.org 1

  2. �� ��!����"��������� • Navigation access dredging $$$ • Islands and breakwaters $$$ • Shoreline protection • Navigation hazards • Fisheries 776 • Wetlands � � � � � � � � � � 7 7 2 774 www.ma-rs.org ���� ������������"��������� • Ecological data collection • Further evaluation of dredging, breakwater and island construction • Identification of experiments • RKLD team currently completing description of a range of projects for detailed evaluation by Corps of Engineers and DNR www.ma-rs.org 2

  3. #����������$����%��������� www.ma-rs.org www.ma-rs.org 3

  4. ������������&'�����(��������� Coontail www.ma-rs.org www.ma-rs.org 4

  5. )'*�������&'�����(��������� Coontail www.ma-rs.org $� ����������� +'�������� ��������,������ www.ma-rs.org 5

  6. -� �����������������$��*���� • Expensive 775 • Alternative layout and depths 776 • Beneficial use of spoil vs. � � � � � � � � � � � � 772 disposal 774 • Chief question: rate of infill and sediment transport 7 7 6 � � � � � � � � � � 7 7 2 774 www.ma-rs.org Lakebed Sediment Sampling www.ma-rs.org 6

  7. ��*������$��� 70% fine sand (some locations) www.ma-rs.org ,�����������$��*������������������ • Islands • Uplands • Natural shoreline areas subject to erosion • Containment options – Geotubes – Stone Berms www.ma-rs.org 7

  8. ����*����������������� #�������%�������. !��������������� • Offshore islands & breakwaters • Nearshore islands and breakwaters – pros & cons • Onshore revetments: – Standardized designs – Both River and Lake designs – Consider high & low lake stages www.ma-rs.org /���������*� ����*������� ���������� • Natural shoreline erosion • Access requirements • Difficult offshore / onshore choices www.ma-rs.org 8

  9. +�����0�#����������� • Spawning: areas adjacent to Lake Koshkonong – protection and enhancement • Rough fish control: upstream control & in- lake harvesting www.ma-rs.org Mud Lake Protection and Enhancement Projects • Repair or rebuild carp gate structure and install new gate with floating top to accommodate boat access. • Build up shoreline to near 780 msl with dredge spoils or breaker run armored with riprap • Build access road to carp gate at or above 780 msl for maintenance, stocking access of Mud Lake • Possibly install low fence on Blackhawk Island Road side of Mud Lake to keep carp out during floods over 781 msl • Actively manage Mud Lake to keep aquatic invasive species (AIS) from becoming established. 9

  10. )'*������#��������������� www.ma-rs.org $� ������������#1����������+��� ����������#���0�2������������� • Collect field data on critical aspects of potential full-scale projects • Not all potential experiments will be implemented – funding to be determined www.ma-rs.org 10

  11. #1����������3�$��*���������-� ���������� ���������*�"�����*�#�������������*� �������������������� www.ma-rs.org #1����������3�,������ �� • Protect eroding wetland shoreline that could breach • Provide additional wetland habitat that has been lost in historic time • Dredge large enough area adjacent to boat launch ramp so that monitoring of sediment transport is representative of potential large- scale projects www.ma-rs.org 11

  12. #1����������3�$��*�����%�������� • Dredge for shoreline navigation access at the North Shore Boat Landing dredge area www.ma-rs.org #1����������3� ����������������������%�������� • Construct a 550’ breakwater near Mud Lake to fill dredge material behind • Restore the fill area • Protects Mud Lake by keeping it separate from Lake Koshkonong. • Creates habitat for wildlife breakwater and fill www.ma-rs.org 12

  13. #1����������3�)'*����� Shoreline between Mud Lake Mud Lake and Lake Koshkonong needs reinforcement. A break in the shoreline between Mud Lake and Lake Koshkonong. www.ma-rs.org #1����������3����'�����������#1������ 4����!�����������������!�����*�. "�����%��!�4�0 www.ma-rs.org 13

  14. #1����������3 2��'���������55"�����*�����!����4����*������5 �'�*�*�4����!����. %��������4�0 White Crow Bay Credit: Microsoft Bing www.ma-rs.org #1����������3 %����������������4����!��������'��'�� www.ma-rs.org 14

  15. #1����������3�2������������� • Construct containment breakwater– possibly late fall/ winter • Dredge North Shore Road boat landing, with spoils placement behind breakwater • Restoration vegetation and maintenance • Monitoring www.ma-rs.org #1����������3� %����4����������)'*������,'���� www.ma-rs.org 15

  16. #1����������3�,������ �� • Carp gate in channel to Mud Lake is in need of repair/replacement– implement and monitor design approach • Must accommodate public access • Keeping spawning carp out and allowing game- and pan-fish egress to main Lake www.ma-rs.org #1����������3 %����#1����'�����������"����� www.ma-rs.org 16

  17. #1����������3� %����%�������)����*� Cootes Paradise Fishway: Hamilton, Ontario Expect to try net (possibly multiples) with floating top, anchored the bottom, similar to DNR experience on Lake Butte des Morts Carp Fence at Tonetta Lake, NY www.ma-rs.org #1����������3�2������������� • Install carp gate– Winter condition drawdown • Monitor carp movement and blockage • Monitor changes in Mud Lake www.ma-rs.org 17

  18. #1���������63��-� �����������������*� 2���� ���������4�������4�0 www.ma-rs.org #1���������63� 4�������4�0�$��*�������*�4����!���� breakwater dredge area www.ma-rs.org 18

  19. #1���������63�,������ �� • Monitor access channel sediment accumulation for documenting the efficiency of selected navigation improvements www.ma-rs.org #1���������63�4����!�����%������������ 4����!�����%�������������7������������8 3' 777' 2 2 3' 1 1 774' 15' www.ma-rs.org 19

  20. #1���������63�2������������� • Access and shoreline arrangements • Construct breakwater • Dredge oxbow channel and Lake in front of the channel in Bingham www.ma-rs.org #1���������93� +��������2����*����,��5�������������*�"���� www.ma-rs.org 20

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