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04-12-22 Agenda Packet
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04-12-22 Agenda Packet
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Comparison to Snail Lake Reflects Watershed GrowthKarth Lake elevations were about 47 feet higher that those of snail lake in 1970s. Adjusting Karth Lake observations downwards by 47 feet offers another view of the effects of development on lake levels.Monthly lake level data for Snail Lake supports the hypothesis that the rise in Karth Lake levels have been primarily due to expansion of its watershed that occurred in the late 70s and early 2000s, rather than due to changes in weather.There were no Karth Lake measurements during low water level years of 2009 and 2010, but residents observed significant declines, as did Snail Lake. Snail Lake requested a diversion of water from Vadnais around that time. Its levels have been on the rise since then through the beginning of the current drought.Snail lake data from https://files.dnr.state.mn.us/cgi‐bin/lk_levels_dump.cgi?format=csv&id=62007300
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