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167 eliminating the infiltration capacity of the basin. This resulted in localized flooding of 16$ the surrounding properties: As a part of the Applewood Pointe redevelopment project in l 69 2003, the City reconstructed this pond. The reconstruction project nearly doubled the 170 capacity of the basin. Years of sediment accumulation. was excavated, restoring the 171 infiltration capacity that had been sealed. In addition, a lift station was constructed to 172 provide a secondary outlet for extreme events. The new pond serves as a regional storm 173 water treatment facility for the subwatershed. 174 Recommended 2009 action: 175 This area has been removed from the CSWMP problem areas. 176 F. Area G: 35W corridor 177 Historically the City has observed flooding within the 35W corridor ponds after extreme 1'78 rain events. These ponds include the basins on both sides of the 35W just to the north of 179 County Road C and around the highway ramps. The primary concern for these 180 subwatersheds is the downstream pipe located within the Mn/DOT right- of way. This 1$1 pipe is 21 inches in diameter. Simply increasing the size of the pipe would push the 182 problem down stream causing flooding in another location. Also, this corridor is located 183 within Rice Creek Watershed and their new volume reduction standards would not 1.84 support an increase to the runoff discharged to Long Lake. As a part of the County Road 185 C project, additional storage was constructed to address the runoff from County Road C 186 through ponding and rain gardens. 187 Actian to Date: 188 This subwatershed was added as a problem area in 2006. 189 Recommended 2009 action: 190 In an effort to address some of the flooding concerns in this problem area; staff will 1.91 continue to require redevelopment projects to reduce the volume of water that is sent to 192 this system. A reduction in the peak flow from the commercial properties located in the 193 subwatershed will alleviate the demand on the 35W trunk sewer.. 194 G. Area 7: Como Sub 7- Gottfried Pit 195 In 2003, the City of Roseville cooperated with Capitol Region Watershed 17istrict 196 {CRWD), falcon Heights, the City of St. Paul, and Ramsey County on a study of down 197 stream flooding and water qualityissues for the northwestern watershed area to Como 198 Lake. All of these entities contribute storm water flow to Como Lake. This study 199 identified improvements that would. be made to mitigate the ongoing storm water issues 200 in this area. The study also assigned proportional cost shares to each entity based on 201 contributory flow with CRWD agreeing to contribute funding for a portion of the 202 improvements. They served as the lead agency on this study and for the subsequent 203 improvements to occur on the Como Golf Course and additional storage at Arlington and 204 Hamline Ave~naes. 205 Roseville drains 315 acres into Como Lake via Gottfried Pit near Fernwood Street and 206 Larpenteur Avenue: The work completed as a part of the agreement does not completely 2.07 address the drainage concerns detailed in the report. 208 209 City of Roseville 2008 Storm Water Annual Report Page 6 of 14