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City of Mounds View Page 11 Local Surface Water Management Plan 435-08-135 2.7.4 WETLANDS There are several wetland basins identified in the City’s 2006 Wetland Inventory. Eight of these are DNR protected waters, Spring Lake, Silver View Pond, and 5 unnamed wetlands as identified on Figure 2.3. Most of the wetlands in Mounds View are isolated wetlands scattered throughout the City, however one will find a large wetland on the northern border of the City near Ardan Park and the Medtronic Campus (the former Bridges Golf Course) and along the floodplain of Rice Creek in Long Lake Park. The locations of all wetlands within Mounds View are identified on Figure 2.3. Silver View Pond, located south of TH 10, between Long Lake Road and Silver Lake Road, was created in 1982 to provide stormwater storage for developments proposed within its drainage area. The pond was designed to have three distinct arms or basins with narrow connections between each to retard the movement of sediment and nutrients toward the outlet.2 2.8 NATURAL RESOURCES The City of Mounds View includes no regional open space elements. Significant local open space elements are in the form of parks, trails, lakes, wetlands, and a public beach. Current City parks incorporate traditional park amenities such as athletic fields, hockey rinks, picnic areas, play areas, and pedestrian trails. Many of the eleven parks provide trailways throughout. The City's main sidewalks can be found along Silver Lake Road, Long Lake Road, County Road I and Quincy Street. Otherwise, local sidewalks within street boulevards carry the bulk of pedestrian traffic within the City. 2.8.1 RARE FISH,WILDLIFE AND PLANT SPECIES According to the DNR's County Biological Survey, "rare plants or animals are either protected under the provisions of the Federal or Minnesota Endangered Species Acts, or are being considered for protection.” According to the DNR's database of unique and sensitive plant species there are natural wetland plant communities and rare animal special found in Rice Creek Watershed District, however none of these are found in Mounds View. 2.9 DRAINAGE SYSTEMS The City's drainage system is divided into eleven drainage districts and 45 drainage subdistricts, as shown on Map 1 in Appendix A. Ultimately all eleven drainage districts within the City flow into Rice Creek through various storm sewer connections and drainageways. The bulk of Mounds View‘s surface water management system was built prior to 1980. As was the practice at that time, surface water management relied heavily on large diameter trunk storm sewer to route runoff away from impervious areas quickly and discharge this runoff directly into a nearby receiving waterbody. In many areas of the City, the primary means for conveying stormwater runoff is within existing streets. At points where flows from several streets converge, catch basins are installed to route flow into storm sewer. The City’s current drainage system resulted from the economic realities prevalent during system construction in the 1960s and 1970s. As such, it does not meet the City’s current 5-year storm 2 Excerpts from the Silver View Pond Management Plan