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threshold beyond which future problems with blue-green algae are likely. Consequently, serious consideration should be given to providing on-site pre -ponding for any major developments proposed within the drainage area in the future. A suitable natural location for such ponding appears available in an existing wet meadow which lies between County Road I and the old County Road I corridor at the north end of the drainage area. IV. STORMWATER SYSTEM Silver View Pond receives stormwater both overland and via a number of storm sewer outlets that empty directly into the pond. The Silver Lake Woods single-family residential development in the southwest portion of the drainage area drains to the pond via 3 storm sewer outlets; 12- and 15 - inch reinforced concrete pipes (RCPs) emptying into the south arm of the pond and a 27 -inch RCP emptying into the west arm. This system also drains portions of Silver Lake Road and County Road H-2. The Silver Lake Woods Multi -family development in the north - central portion of the drainage area drains directly to the pond via 2 18 -inch RCPs. This system also receives drainage from Silver View Plaza, Super America and Burger Bing at the north end of the drainage area. The Scotland Green apartment complex in the southeast portion of the drainage area largely drains to the pond overland, though there are several small culverts that serve as surface drains from the northernmost parking areas. all other portions of the drainage area drain overland to the pond. Silver View Park partially drains directly to the pond and partially to a wetland area adjacent to Silver Lake Road. This wetland then drains via an intermittent drainageway to the west arm of the pond. V. BIOLOGICAL CHARACTERISTICS OF BASIN A. Aquatic Vegetation Aquatic macrophytes within Silver View Pond were mapped on July 24, 1989. The distribution and density of macrophytes varied with water depth and location. The predominant aquatic macrophytes were elodea (Elodea canadensis), water milfoil (MXriophXllum verticillatum), white water lilies (jymphaea odorata, and yellow water lilies (Nuphar variegatum). In scattered, very shallow locations along the fringes of the pond, lotuses (Nelumbo lutea) have become established. A few floating colonies of blue-green algae were observed. The pond margins were vegetated with typical emergent wetland plants including cattails (Typha latifolia), spike rush (Eleocharis palustris),and hardstem bulrush (Scirpuus acutus). 74