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Storm Water Management PROPOSED STORMWATER MANAGEMENT The redevelopment area has been evaluated based on our current understanding of the Rice Creek Watershed District (RCWD) Rules. This understanding is based upon the written versions of the current and proposed rules as well as our meetings and other correspondence with watershed staff. In order to meet the requirements of the watershed, we have employed t e of a variety of Best Management Practices (BMP's). This combination of BMPs offers the ion to stormwater treatment. The BMPs include traditional NURP style ponds, rain ga s, pe avements and irrigation. The most significarrt of these BMPs is the irrigation strat The ide is that by storing w er and releasing it via an irrigation system, we satisfy the ne ation r'rements. Altho e watershed rules do not specifically address the use of this str ee nfident that ey will approve of such a system based on our meetings with their staff and adm tor, The most expensive part of that system will be the pumps, controls and irriga ' ing. We have s a range of costs in our estimate, ' indicating that the cost will vary greatly depen the system i d and how it is designed. I We believe, from our initial calculations that the S en mmunity Center pond could be , used, without major modifi ' the purpose rage. Ob sly, this would require some type of I agreement between the ' and t rch. If the c annot reac an agreement with the church, an altemative would be uct a p `in Laurie Lam P rk. This pond would be fairly deep and its additional cost is shown on st e as an addit al alternative. � Previous e� � ithou `' rigation sys em were much higher due to the need for large amoun pervious pave eet t °_ D' filtration requirements. j �, City of Centerville Project No: 616-07-1610 Downtown Redevelopment � �n�r� Page ] 0