Lake Ellyn Park 2013 Master Plan

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3. the vision 2. Lake and hydrology Since flooding and water quality is of great concern at Lake Ellyn Park, strategies to improve water quality and reduce rainwater runoff should be implemented at the park and surrounding community. This includes green infrastructure, native landscape, and water quality enhancement techniques. The following strategies are being employed to contribute to a healthier Lake Ellyn: Filter Berms Filter berms located near the two inlet structures provide the first line of defense to filter stormwater entering the lake. The planted filter berms are constructed of open graded gravel that allows runoff to pass through them. Because the roots are in virtually hydroponic conditions, they take their nutrients from the water rather than from soil. Most of the water entering the lake from the two inlet structures will pass through the gravel of the filter berms allowing the plant roots to take up the nutrients as well as other dissolved pollutants in the runoff water. The berms will also help to filter sediments and other particulate pollutants. Larger flood events will pass over the top of the berms, to ensure that the berms do not increase flood potential. Open water Gravel filter berm under boardwalk bridge Open water gravel berms with boardwalk bridges filter incoming stormwater and provide a scenic viewing platform 38 Glen Ellyn Park District
3. the vision Floating Restorers The filter berms described above will primarily address runoff as it enters the lake. The floating restorers are intended to address water already in the lake and pollutants that are not filtered by the berms. Floating restorers would be located at key points throughout Lake Ellyn to provide further cleansing. Vegetation within the floating restorers have their roots suspended within the lake water below and like within the filter berms, the roots will take up nutrients from the lake water, reducing the availability of nutrients to grow algae. Further, the restorers include a plastic substrate that hangs within the water, providing a surface for biofilms to develop to further utilize nutrients within the lake water. The restorers are mobile, so they can be placed in the most strategic locations during the spring, summer, and fall, and relocated to the edges of the lake during the winter to allow a larger skating surface. Shoreline Restoration & Stabilization Stabilization of the shoreline through native plant community establishment will help to reduce shoreline erosion and take up nutrients and other pollutants as well as provide aquatic habitat for fish and other aquatic organisms. Additionally, renovation of some portions of the stone edge can provide additional stability and aesthetic benefits. See the Landscape section for further explanation. floating restorer examples Shoreline restoration example Lake Ellyn Park Master Plan 39
Page 1 and 2: Lake Ellyn Park 2013 Master Plan A
Page 3 and 4: preface Lake Ellyn Park Master Plan
Page 5 and 6: table of contents 1. Background & I
Page 7 and 8: 1 background & introduction a. Proj
Page 9 and 10: 1. background & introduction OAK ST
Page 11 and 12: 1. background & introduction Sustai
Page 13 and 14: 2 site analysis & existing conditio
Page 15 and 16: 2. site analysis & existing conditi
Page 29 and 30: 3 the vision a. Overall planning &
Page 31 and 32: 3. the vision 3. Green infrastructu
Page 33 and 34: 3. the vision Enhance environment/L
Page 35 and 36: 3. the vision Canopy trees with tur
Page 37: 3. the vision Lake Ellyn Park Churc
Page 41 and 42: 3. the vision 3. Landscapes and sys
Page 43 and 44: 3. the vision aquatic habitat. In m
Page 45 and 46: 3. the vision Bioretention along pe
Page 47 and 48: 3. the vision and will be located n
Page 49 and 50: 3. the vision 5. Site furnishings A
Page 51 and 52: 3. the vision Furnishings example f
Page 53 and 54: 3. the vision Furnishings example f
Page 55 and 56: 3. the vision One proposed alterati
Page 57 and 58: 3. the vision Boathouse Restrooms &
Page 59 and 60: 3. the vision Kitchen & South Patio
Page 61 and 62: 3. the vision Refuse & Recycling Th
Page 63 and 64: 3. the vision Conceptual renderings
Page 65 and 66: 3. the vision Outdoor performance a
Page 67 and 68: 3. the vision c. Implementation 1.
Page 69 and 70: 3. the vision Phasing priorities/ma
Page 71 and 72: 3. the vision 2. Maintenance, opera
Page 73 and 74: 3. the vision 2. Stormwater Retenti
Page 75: Lake Ellyn Park Master Plan January

Lake Ellyn Park 2013 Master Plan

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