Agenda - Council - 07/12/2005 - Laserfiche WebLink

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June 17, 2005 East Town Center Park Plan Review Page 2 of 3 The TuffTurf emergency overflow is not shown on the erosion control plan. TuffTurf/Netlon reinforced routes must be provided to all of the outlet control structures for future maintenance access. The title of the Walks and Trail Alignment plan must be updated to include Walls. The liner shading must be shown on the Pond Liner Alignment and Tabulation sheet. The liner must conform to installation performance standards including the leak test. The arrow for 100 year overflow drainage should be removed from the plans as the actual event that would trigger surface overflow fi.om the pond is significantly larger than the 100 year event. The pages where the sections through the liner are shown must be indicated in the plan view. The liner is shown as passing over the existing sanitary sewer line under the street bridge. The liner should be dropped below the pipe to provide connection between the east and west ends of the pond. The thickness of the soil over the liner at the pedestrian bridges must be specified. The sections through the lhxer specify fills of 4 to 6 feet over the liner. The location of the fill should be more clearly defined. The location of the Wetland Clay Liner is not shown in plan view. Each treatment basin needs a ramp for maintenance purposes. The ramp must be ad,jacent to the Tufft-urf path mentioned above.- A horizontal rondel detail is shown, however the installation location is not specified. The plans call for attacNng the liner to the RNnestone Bridge by drilling the piers and installing bolts. This must be approved by MN/Dot since it is an MSA bridge. The vertical penetration boot detail shows HDPE pipe which is not acceptable. The locations of the wall expansion.joints must be specified. The pond contours shown on the paving plan must be updated to match those shown on the grading plan. The proposed volume of the pond must be tabulated by Contour elevation and submitted for verification with the approved stom~water model for the project. The proposed 2 ft wide maintenance strips behind the curbs must be installed with so that they drain over the curb. Grades beyond the maintenance strips can slope into the site. The grades .on the proposed trails must not exceed 5% in any location. The I-DPE pipes linldng the basins in the wetland mitigation area have little or no cover. Alternative methods must be selected for connecting the basins. The gradation of the stone sub-bases under the pavers must be specified. The location of the edging detail must be specified. The HDPE pipes fi.om the splitter boxes to the spreader devices must be replaced with RCP pipes. Adjustment of the location of the spreader devices and outlets from the splitter boxes may be required. Details on the wetland drawdown valve must be supplied. The current graphic in the plans should be supplemented with additional technical drawings. -302-