2005-10-27_Minutes - Laserfiche WebLink

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~II~`, GRASS LAKE WATER MANAGEMENT ORGANIZATION Minutes of Meeting October 27, 2005 Roll Call: Members present: Rich Brasch Rouse Farnham Tracy Mogg Gene Soderbeck Members absent: Jeff DeZellar Others present: Mark Maloney -Shoreview Duane Schwartz -Roseville Cliff Aichinger - RWMWD Bill Bartodziej - RWMWD The meeting was called to order at 5:10 p.m. Lake Owasso Aquatic Plant/Shoreland Survey The Board reorganized the agenda to allow for a presentation by Bill Bartodziej, RWMWD. Mr. Bartodziej distributed a written report for the Lake Owasso Aquatic Plant Survey and Shoreland Assessment and presented slides of photos and data plots for RWMWD work performed earlier this year on Lake Owasso. The presentation of the aquatic plant survey highlighted the sampling methodology, the mapping/plotting techniques used and some preliminary observations. Mr. Bartodziej pointed out that there appears to be negative water clarity and phosphorus trends, and that flat, shallow central portion of the lake was almost devoid of weeds. He pointed out that the DNR has "grandfathered" a higher level of weed killing permits on the lake and the applications are nearly double the standards applied to other metro lakes. Discussion ensued regarding the limits of DNR permitted weed removal and the question of how aggressive management of the lake for water skiing impacts the areas of weeds that are killed/removed. It was also pointed out that the larger boats on the lake are stirring up the sediment in the shallow area as a function of the water ski jump, and the material in suspension is likely impacting the amount of light available for weeds to survive. With discussion, it was agreed that more information regarding the established trends and the relationship between the weed removal efforts and water quality needed to be obtained. Mr. Bartodziej indicated that Lake Owasso was also studied for Shoreland restoration potential. Highlights of this portion of the presentation included a description of the assessment methodology and a map indicating areas of the 5-mile shoreline that were assessed as having good, moderate or poor restoration potential. The RWMWD staff indicated that the County-owned shoreline near the boat launch at the north end of the lake was a good candidate for a shore land restoration demonstration project. An estimate of $100.00