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of Arden Hills - Comorehenswe Plan - DRAFT <br />Listed on 303(d) list of impaired waters: Lake is currently on the impaired <br />waters list (TMDL list) for excessive nutrients. (Lakes that are on the <br />impaired waters list only due to high levels of mercury, and not due to <br />excessive nutrients, are not included in this category.) <br />Potential to become impaired: Available water quality data suggest that <br />the lake is currently not impaired. Due to development pressure or to <br />borderline water quality conditions, this lake has the potential to become <br />impaired in the near future. <br />Lake <br />No Data <br />Listed on the <br />303(d)list of <br />impaired waters <br />Potential to <br />become <br />impaired <br />Johanna" <br />X <br />Josephine" <br />X <br />Karth <br />X <br />Little Johanna <br />X <br />f rden <br />X <br />Round <br />X <br />Sunfish <br />X <br />Valentine <br />X <br />"Listed on the 303(d) list of impaired w a[ers for mercury <br />The 303(d) list is part of the federal Clean Water Act, which requires states to <br />adopt water quality standards to protect waters from pollution. <br />10.5.4 Priority Areas <br />Area 1 — This area contains a relatively diverse assemblage of upland and <br />wetland communities connecting Lake Johanna and Farrel's Lake. Upland <br />community types in this area include aspen forest, lowland hardwood forest, oak <br />woodland, and mesic prairie. Wetland community types in this area include <br />willow swamp, mixed emergent marsh, and cattail marsh. The majority of these <br />communities were given a "medium" ranking in the natural resource assessment. <br />There are also several potential opportunities for wetland restoration within this <br />area, both hydrologic and vegetation. Lake Johanna has the potential to become <br />impaired due to excess nutrients. <br />Area 2— This area contains areas a mosaic of upland and wetland community <br />types surrounding Rice Creek. Community types include forest, woodland, and <br />emergent marsh. The majority of these communities were given a "medium" <br />ranking in the natural resource assessment. The portion of Rice Creek within the <br />City of Arden Hills is currently on the 303(d) list of impaired waters. Aportion of <br />Formatted: Font: (Default) Anal, 10 <br />Pt <br />Formatted: Font: (Default) Arial, 10 <br />DRAFT 72 Pt <br />5/1/2008 <br />