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çiyij � <br /> U P <br /> Requirements: Per City of Orono <br /> Rate Control (City): <br /> Runoff rates may not exceed existing conditions for the 1, 10 and 100-YR storm events. <br /> Atlas-14 rainfall data will be utilized. <br /> Requirements: Per Minnehaha Creek Watershed District (MCWD) <br /> Since the project is less than 3 houses the MCWD rules for stormwater do not apply. <br /> Watershed rules for floodplain alteration, wetland mitigation and erosion control will be met <br /> throughout the construction process. <br /> Proposed Storm Water Facilities: <br /> The project is proposing to utilize two underground storage tanks for rate control purposes. <br /> The underground tanks will be sized appropriately to slow the discharge rates leaving the <br /> site. <br /> The adjacent property to the southeast has concerns regarding stormwater drainage <br /> leaving their site and potential flooding concerns. As part of this project, a swale will be <br /> created along the southeast property line to accept the neighboring property's drainage and <br /> convey it to Lake Minnetonka. This will improve the existing drainage conditions of the <br /> adjacent property. <br /> Pretreatment <br /> Pretreatment has been provided to the underground filtration basins using disconnected <br /> impervious areas. Stormwater running off impervious surfaces will drain through pervious <br /> turf areas reducing the amount of TSS entering the system. <br /> www.CivilSiteGroup.com 4931 West 35th Street•Suite 200•St. Louis Park•Minnesota •55416 (612)615-0060 <br />