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2002 Natural Resources Management
Roseville
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2002 Natural Resources Management
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7/13/2012 10:46:09 AM
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7/13/2012 10:41:05 AM
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The watershed to lake area ratio for Bennett is 26:1, meaning that it has 26 acres of land draining <br />to it for each one acre of lake area. This is a much higher ratio than that for Langton Lake, which <br />has an 8:1 ratio. Bennett Lake's ratio is in the moderately high range for urban lakes and <br />suggests that the lake is likely to receive high amounts of pollutant loads from its watershed. <br />The Bennett watershed contains seven ponds, ranging in surface area from 1.4 to 13 acres. <br />These ponds catch and temporarily hold raw stormwater from the area that drains to them, <br />partially treating the water before discharging it downstream to Bennett Lake. Ponds WP -1, in <br />Willow Park, and BL -4 between Brooks and Transit Avenue receive runoff from watersheds of <br />380 and 67 acres, and have estimated phosphorus removal efficiencies of 50 % and 37 %, <br />respectively. They appear to play important roles treating stormwater before it reaches Bennett <br />Lake. <br />The lake has two aerators; the one to the northeast was installed in 1998 to prevent winterkill. <br />Another aerator located by the band shell is mostly for aesthetics purposes. The DNR has <br />managed the lake for kids fishing for many years. Musky was the popular choice for stocking in <br />Bennett prior to the 90's. More recently the MN DNR has stocked the lake seasonally with <br />Walleye, Channel Catfish, Bluegill, Northern Pike and Largemouth Bass. <br />From water level information obtained from the MN DNR, it appears that the water levels at <br />Bennett between 1987 and 1996 follow a different regime than those from 1997 to the present. <br />There is a difference of at least one to one and a half feet between the mean levels for the two <br />periods. The lowest recorded water level for Bennett was in July of 1987 at 883.94 feet and the <br />highest was in July of 1997 at 890.54. The recorded range in elevation is around 6.6 feet. The <br />last reading of 887.97 by the MN DNR was on October 25th of 2001. <br />City of Roseville 49 <br />Parks Natural Resource Management <br />
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