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Wetland Natural Community Descriptions and Management <br />Recommendations <br />Much of the original alterations to the wetland basins occurred when the land was in agricultural <br />production. Under agricultural land -use there was a main ditch that extended from W 1 thru W2, <br />W4, and into W10. Lateral ditches extended into the main ditch from W3. Wetlands have <br />experienced additional changes during the transition from agriculture to urban development in <br />the last sixty years. W1 has been altered through the excavation of open water areas and the <br />infestation of purple loosestrife and reed canary grass. Wetlands W2, W3, W4, and W5 were part <br />of an agricultural drainage ditch system and have benefited by the return of hydrology to the <br />system. The wetlands on the south tip of Lake Owasso are relatively unchanged. Bennett Lake <br />has changed significantly from a drained wetland to an open water lake. Stormwater and urban <br />runoff has probably influenced this change. Locations of the improvements discussed in the <br />following paragraphs are shown in figure 6.4. <br />Community CP -W1 <br />Shallow Marsh /Shrub - Carr /Shallow Open Water <br />Qualitative Rank: Low <br />Area: 32.0 acres (38.4 total) <br />This wetland complex contains several different wetland communities, including shallow marsh, <br />open water, shrub -carr and wet meadow. The different wetland communities provide the <br />valuable wildlife habitat and aesthetic values that the users of the park enjoy. Dominant <br />vegetation within the wetland complex include: cattail, arrowhead, reed canary grass, bur -reed, <br />red osier dogwood, willow, and duckweed <br />This is a large wetland basin associated with the interpretive center in the park. It has a <br />boardwalk system providing access to most of the wetland and appears to be heavily used by the <br />public. Five areas of duck pond excavations are near the center of the basin. This basin also <br />receives stormwater and may receive chemical runoff from roads, houses on east side, and the <br />compost site on the west side. This basin has the most prolific area of purple loosestrife <br />infestation of all the parks surveyed and is considered to have a high density of purple <br />loosestrife. <br />City of Roseville 93 <br />Parks Natural Resource Management <br />