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the storm water runoff flows through a dual pipe system west to storm sewer system was built in the 1970s and additional build-out of the neighborhood, which included the filling of wetlands, resulted in an under-sized storm sewer system for todays conditions. The pipe configuration at Draper Avenue and Midland Hills Road c system, which causes localized street flooding. The streets in this neighborhood are in good condition; upsizing the entire storm sewer system wouldnt have been a cost-effective manner in which to improve the drainage conditions, as it would have required significant pavement removal and excavation. In addition to costs, upsizing the pipe Walsh Lake. Since the outlet of Walsh Lake is controlled by a lift station, increased flow to Walsh Lake could cause significant problems downstream and localized flooding Instead, the City of Roseville installed 19 neighborhood raingardens in the Walsh Lake area to encourage infiltration of stormwater runoff and alleviate frequent local flooding problems. Additionally, a large underground storage/infiltration device was installed and Rosewood Wetland was expanded to provide additional stormwater storage and treatment capacity in this area. Creating additional storage possibilities throughout the existing storm sewer system alleviated the stress on the existing system; reduced the threat of flooding, while also improving water quality. By creating additional storage to reduce the risk of Rain garden being constructed in Rosewood Neighborhood flooding, street flooding has also been reduced. 5.1.2Aladdin Street Bioinfiltration Basin Retrofit Installation A long urbanized area along Aladdin Street in Roseville drains to a wetland which is hydraulically connected to Lake Owasso. To provide water quality treatment for this area, the Grass Lake Watershed Management Organization, in cooperation with the Ramsey Conservation District and City of Roseville, installed a bioinfiltration basin with funding provided by the Clean Water Land & Legacy Amendment Fund. Aladdin Street Bioinfiltration Basin Retrofit (Source: Ramsey Conservation District) 5.1.3Arona Pond Reconstruction Arona pond is located within the Applewood Pointe redevelopment development, this pond was a landlocked basin. For years, the normal water level of the pond was governed by infiltration. As the surrounding area developed,a part of the storm water system. An outlet was installed around 1979 that runoff from extreme events. Approximately 112 acres contribute rArona Pond. Over the years, the sandy bottom of this pond became sealed with sedi eliminating the infiltration capacity of the basin. This resulted in localized f properties. As a part of the Applewood Pointe redevelopment project in 2003, pond. The reconstruction project nearly doubled the capacity of the basin. Years of sediment Comprehensive Surface Water Management PlanROSEV120222 City of RosevillePage 28