Figure 1: Basin Layout
The retention basin in this design consisted of two parts: the permanent pool and the control pool as showed in Figure 1. The permanent pool will serve as a sustainable habitat for the future fish and wild life population. The water in the permanent pool is expected to maintain a constant depth of at least 15 ft. year round. The depth of the permanent pool was designed so that the fish population can continue living in their habitat even when the basin’s surface gets frozen over the winter months. The control pool will serve as temporary water storage during a storm event thus preventing the runoff from flooding the area. The water in the control pool will be released through an outlet structure into an appropriate culvert. The volume of runoff associated with a 100-year storm will determine the overall dimension of the control pool.