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47 °10 and 32.5 %, respectively, of thc watershed. Open area, including woods, accounts far about <br />16 % and roads for about 4% of the totai area of the watershed. The watershed area is small for <br />urban lakes and the development density is fairly low with the exception of the <br />commercial/industrial area in the west and southern portions of the watershed. <br />Langton has 8 acres of land draining to it for each acre of lake surface. The ratio, known as the <br />watershed-to-lake area ratio, often ranges between 10 acres to as high as 200 acres of Iand per 1 <br />acre of lake for urban watersheds. The relatively low watcrshed-to-lake-area ratio for Langton <br />Lake suggests that pollutant loadings to the lake should be relatively low and that the lake will <br />retain the water it receives from its watershed for a fairly long time. <br />The Iake has three cells, the narth, middle and south with surface areas of 3.b, IQ and 9.5 acres <br />respectively. These are described briefly below. <br />City of Rosevidle 37 <br />Parks Nnurral Resoiarce Mc�t�ngerrie�at <br />