04/25/2023 MASHPEE-WAKEBY LAKE MANAGEMENT COMMITTEE Minutes

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Mashpee - Wakeby Lake Management Committee April 25,2023 7:00 PM ........ ....... W....-._........ ®Ma*pee Town...Hall........................ Meeting called by: Debi McManus Type of meeting: Monthly Secretary: Barbara B. Nichols Attendees: Members: Barbara Nichols, Mike Rapacz, Don MacDonald Paul Bibo/phone Guests: Ashley Fisher DNR The minutes of the March 28, 2023 meeting were accepted as written after a motion by Paul Bibo and second by Mike Rapacz. Agenda topics [Agenda topic 1] Lake level/River outflow Discussion: Debi did the lake measurements on April 1st and 15"'. There were 55.4 and 55.3 feet above sea level. There were 15 and 13 inches of water were flowing over the board closest to the lake. On the 1 st there were 12 inches of water in the stream and 13 inches on the 15th. The new metal gauge by DPW decreased from 13.5 to 12.5 during this time period. DPW had dredged the stream on both sides of the cage at the end of March. Barbara measured 2.4 inches of rain in her gauge from mid-April to mid May. Levels were reported to Drew McManus in Conservation. Conclusions: The water levels have decreased slightly with lower precipitation. [Agenda topic 2] Pond Study Discussion: Ed Eichner from TMDL Solutions and SMAST Coastal Systems updated the Select Board with a technical memo April 3rd. The sonde tubes were deployed in mid-April and the testing resumed then. Data from around the boat ramp and cranberry bogs has been collected as have sediment cores from the deep basins. The oxygen levels have further decreased in the deeper holes of each lake and as early as June 22"d last year. Data from this study will be compared with the last 20 years of PALS (Ponds and Lake Stewards)data. Conclusions: Testing resumed in mid- April.