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125 <br />126 <br />127 <br />128 <br />129 <br />130 <br />subwatershed. Flooding at Fairview would be reduced to 3.3 feet. Estimated cost: <br />$156,000. <br />Option 3: Provide aggressive rate control for the Rosedale Mall site. <br />This option assumes a 40% reduction in peak flow from the Rosedale Mall site. It also <br />assumes that options 1& 2 are implemented. Estimated Cost =$787,318 + costs for <br />Rosedale improvements. <br />131 Option 4: Construct a new storm sewer trunk line along Fairview Avenue. This option <br />132 includes the construction and reconfiguration of the Fairview trunk storm sewer. It <br />133 eliminates flooding under TH 36 and on Gluek Lane; however, it pushes the water <br />134 downstream to the pond in the SE corner of Fairview and C, increasing the high water <br />135 <br />136 <br />elevation by 1.3 feet. Estimated cost: $1,935,000. <br />Action to date: <br />137 The only option discussed in the CSWMP that addressed the street flooding issues <br />138 completely was Option 4; however, due to potential impacts to the homes located around <br />139 the pond in the SE corner of Fairview and County Road C, staff does not feel that this <br />140 option is feasible. After a 6-inch rainfall event that occurred 10/4/2005, we experienced <br />141 localized flooding in a number of different areas around the City. The home at 1779 <br />142 Rose Place was flooded during this extreme rain event. <br />143 Due to the cost, limited benefit, and potential impacts to the properties located around the <br />144 pond at Fairview and County Road C, staff does not recommend proceeding with any of <br />145 the options as described in the CSWMP. <br />146 Recommended 2009 action: <br />147 In an effort to address some of the flooding concerns in this problem area, staff will <br />148 continue to require redevelopment projects to reduce the volume of water that is sent to <br />149 this system. This is similar to the action described in Option 3. A reduction in the peak <br />150 flow from the commercial properties located in the subwatershed will alleviate the <br />151 demand on the Fairview trunk sewer. <br />152 On December 27, 2007 the City purchased the home at 1779 Rose Place as way to <br />153 eliminate the potential of future property damage during extreme storm events. This <br />154 house was demolished in 2008. In 2008, Rice Creek Watershed District completed the <br />155 "Southwest Urban Lakes Study"; a roadmap by the Watershed District for future <br />156 management activities and water quality improvement projects. This site was identified <br />157 in the Little Lake Johanna Management Action Plan for a potential surface feature to treat <br />158 local street runoff from Rose Place. The City will work with Rice Creek on the <br />159 <br />160 <br />implementation of this plan. <br />E. Area 5: Arona Pond and surrounding area. <br />161 Arona pond is located within the Applewood Pointe redevelopment area. Prior to <br />162 development, this pond was a landlocked basin. For years, the normal water level of the <br />163 pond was governed by infiltration. As the surrounding area developed, the basin became <br />164 a part of the storm water system. An outlet was installed around 1979 that enabled the <br />165 basin to pass runoff from extreme events. Approximately 112 acres contribute runoff to <br />166 Arona Pond. Over the years, the sandy bottom of this pond became sealed with sediment, <br />City of Roseville <br />2008 Storm Water Annual Report Page 5 of 14 <br />