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HomeMy WebLinkAboutCAO 03-14 co • Report to Executive Committee I KERI Report Number: CAO 03-14 Date: May 12, 2014 From: Tony Prevedel Chief Administrative Officer Subject: Eurasian Water-Milfoil Weed — Frenchman's Bay - File: A 1440 Recommendation: • 1. That Report CAO 03-14 of the Chief Administrative Officer regarding Eurasian Water-Milfoil Weed — Frenchman's Bay be received; 2. That staff be directed to provide Allies of the Frenchman's Bay Association with funding for Eurasian Water-Milfoil Weed control in the form of a grant to a maximum of$21,875; and 3. That staff report back to Council annually regarding the status of the milfoil weed presence in Frenchman's Bay. Executive Summary: Over the past few years, Eurasian Water-Milfoil (EWM), an invasive aquatic weed has been quickly re-colonizing in Frenchman's Bay, causing problems for boaters and paddlers. A community group has formed the Allies of the Frenchman's Bay Association (AFBA), with the focus of jointly combating the milfoil weed problem. They have been researching the various methods for controlling EWM and have prepared a Management Plan that proposes an integrated management approach. • In early August 2013, approximately 20,000 milfoil weevil eggs and larvae were stocked in the bay adjacent to Bruce Hanscombe Park. The association is recommending that the Weevil stocking program be continued in 2014. As weevils are less effective in high activity areas, the association is recommending that dredging be undertaken in key navigational channels and around docks. They are also recommending a pilot project using the laminar flow aeration system. Measuring and evaluating the effectiveness of the management efforts and overall plant growth in the bay will be undertaken by the Toronto and Region Conservation Authority. Financial Implications: In 2013, Council approved a grant for up to $30,000 as the City's share for the first year of the program. Due to a cool spring, the EWM did not get established very early and less weevils were stocked. As such, the City only contributed $8,325 in 2013. 1 Report CAO 03-14 May 12, 2014 Subject: Eurasian Water-Milfoil Weed Frenchman's Bay Page 2 As part of the 2014 Current Budget, Council approved a grant of up to $21,875 as the City's share for the Eurasian Water-Milfoil Weed control program. Ontario Power Generation have donated $10,000 to be applied to the City's share of this program with the balance of the City's share being funded by property tax. AFBA's Funding Contribution Plan for the EWM Action Plan 2014 is valued at a total of $81,675. The City's share represents approximately 26% of the total budget, with the balance of the funds being provided by the Pickering Harbour Company, Swans Marina, Frenchman's Bay Yacht Club, Dockominium, Dragon Boat Club, Pickering Rouge Canoe Club, PARA, TRCA, and fundraising/donations. The EWM Action Plan is also forecasting funding requirements for the following 3 years. The City's share are estimated to be $20,000 for 2015, $10,000 for 2016 and $5,000 for 2017. Discussion: Over the past few years, Eurasian Water-Milfoil (EWM), an invasive aquatic weed has been quickly re-colonizing in Frenchman's Bay. During the summer of 2012, the weed grew so aggressively that it became a problem for boaters and paddlers by binding up propellers, keels and paddles. Members of the boating community and residents around the bay formed the Allies of the Frenchman's Bay Association (AFBA), with the focus of jointly combating the milfoil weed problem. The group have been researching the various methods for controlling milfoil weed and have prepared a Management Plan that proposes an integrated management approach. As outlined in the "Frenchman's Bay Eurasian Water-Milfoil Management Plan" (attachment 1), the goal of the management plan is to reduce the abundance of EWM, protect and restore rooted native aquatic plants, protect the fishery, improve water quality and clarity, and to enhance the navigability and recreational/commercial use in Frenchman's Bay. The control measures used must be balanced, environmentally sound, and financially feasible. The Associations goal is to adopt a long—term strategy to control and monitor the growth or decline of the EWM and to determine the best management approach based on existing conditions. Included in the management plan is a brief description of the control methods that AFBA have been researching, along with their pros, cons and associated costs. These methods include: • Mechanical Harvesting • Rotovation • Dredging • Herbicide • Biological (Milfoil Weevils) • Benthic mat • Hand harvesting • Water draw down • Laminar flow aeration CORP0227-07/01 revised 2 Report CAO 03-14 May 12, 2014 Subject: Eurasian Water-Milfoil Weed Frenchman's Bay Page 3 • Hypolimentic aeration Staff have met with representatives of the AFBA to discuss their approach for this year's program. Their plan is to continue with introducing more milfoil weevils into the bay when the conditions are suitable. They are also planning to introduce a test site using ' the laminar flow aeration system. A resident on the west side of the bay has offered to assist in the funding for this pilot project by providing the hydro required to run the compressor system. Further dredging is being done by the Frenchman's Bay Yacht Club, to maintain the channel from their site to the harbour entrance. Pickering Harbour Company are dredging around their docks as well as providing a deeper channel from their site to the harbour entrance. Swans Marina have indicated plans to dredge around their docks as well. The dredging work is not an AFBA initiative and is not being funded by them. Attachments: 1.. Frenchman's Bay Eurasian Water-Milfoil Management Plan, Allies of Frenchman's Bay Association — Revised March 31, 2014 Prepared By: Approved/Endorsed By: Arnold Mostert, OALA Ric .rd Holbo ", P. Eng. Senior Coordinator D)rector, Engi eering & Public Works Landscape & Parks Development • AM:am - Recommended for the consideration of Pickering C. Counci � �/ 28, wt4 Tony Prevedel, P.Eng. Chief Administrative Officer CORP0227-07/01 revised 3 ATTACHMENT Tc REPORT#_,e,qp 0 -I* 4?D till )711 ■—• cp. co •01 ep ta.) TA ) 2.) I.) 0 tri rad z z - ° 3 4° tit z 4 • . . —I a 0 O o CD (1)N CD d O O b Uq cA O CD Q; r. 1 s r* 0 0 O (D ra r+ .t 6 - r+ U4 �t .-. 0 `C3 O �-- �-. 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