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city of Centerville March 13, 2002 Council Minutes Mr. Perry indicated that in June of 2000 a study was done using Art Hawkins recording data. He noticed ,unusual behavior and noticed the birds were not flying as they should have been and in early July of 2001 it was found that the rookery bad again fiilled. In August of2ooi a task force was formed to look at the potential causes. Mr. Perry indicated that in January of 2002 the Peltier Island Heron Rookery Task Force met to discuss recommendations and had determined that a no wake zone would give the birds an opportunity to successfully nest this year. He then comment~ that the least amount of protection would be the 100 meters south of the rookery. Mr. Perry quoted a study from the University of WISCOnsin at Madison concerning the impact of motorized watercraft on ecosystems in shallow lakes. He summarized that the study determined the impact of no wake zones is greatest in shallow lakes or close to shore. Mr. Perry indicated he understood the rationale for angling the line in order to accommodate lakeshore residents. He then said the County feels that the proposal of Lino Lakes would provide adequate protection for the birds. He further noted that Anoka County Parks and Recreation does not want to close off the area because the Wargo Nature Center has a heritage lab on the western shore of the lake and does programming over there and there are plans for a wildlife viewing observation deck for kids to learn about the rookery and the aquatic plants. Mayor Swedberg commented that the birds mayor may not come back but instituting a no wake zone would protect the aquatic conununity in the lake which is important for water quality and clarity. Mr. Perry agreed. Ms. Connie Grundhofer, 235 Linda Avenue, in Lino Lakes presented pictures of birds that were taken years ago and those birds are no longer in this area. She then indicated that last year the birds were back on the island by March 5 and she has not yet seen any but will continue to watch for them. Ms. Grundhofer indicated that birds and plants cannot speak for themselves and need to be protected. Mr. Marty Asleson from Lino Lakes commented on the issue of stirring up the sediment and releasing phosphorus in the water to be used by the algae for blooms. He also noted that winter activities in the area would not be restricted. Mr. Dave Pecchia, 7609 Pehier Lake Drive, said he knows little about bir~ bugs, trees or leaves but really enjoys the lake. He then indicated he is comfortable with a no wake zone but is concerned that the angle of the no wake line puts swimmers in danger of coming into contact with the high-speed boats. He then asked that a study be done to determine if it is safe to have the line angled in such a manner and said he would be amenable to having the line come straight across ifit would be safer. Page 9 of21