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City of Arden Hills- Comprehensive Plan - DRAFT <br /> Each lake located within the Rice Creek Watershed District was evaluated to <br /> determine its potential for water quality impairment due to excessive nutrients <br /> (Table X). The lakes fell into one of five categories: <br /> o No data: Not enough water quality data available for evaluation. <br /> o 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 /> o 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 /> Listed on the Pbtential to <br /> Lake No Data 303(d)list of become <br /> impaired waters impaired <br /> Johanna* X <br /> Josephine* X <br /> Karth X <br /> Little Johanna X <br /> Marsden X <br /> Round X • <br /> Sunfish X <br /> Valentine X <br /> *Listed on the 303(d)fist of impaired waters 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 contains a relatively diverse assemblage of upland and wetland <br /> communities connecting Lake Johanna and Farrel's Lake. Upland community <br /> types in this area include aspen forest, lowland hardwood forest, oak woodland, <br /> and mesic prairie. Wetland community types in this area include willow swamp, <br /> mixed emergent marsh, and cattail marsh. The majority of these communities <br /> were given a "medium" ranking in the natural resource assessment. There are <br /> also several potential opportunities for wetland restoration within this area, both <br /> hydrologic and vegetation. Lake Johanna has the potential to become impaired <br /> due to excess nutrients. <br /> DRAFT 66 . <br /> 3/14/2008 <br />