Agenda - Council - 06/28/2005 - Laserfiche WebLink

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Prelim/nary Plat and Preliminary Site Plan Review: Ramsey Town Center 8th Addition May 27, 2005 Revised: June 24, 2005 Page 4 of 7 Thc 100-year high water elevation of ail detention areas must be shown and the lowest openings in the adjacent houses must be 2 feet above the emergency overfiow for the detention area. The proposed pending areas in the back yards must be protected by drainage and utility easements. 100-year elevations are also needed for areas of the backyard that will be within drainage and utility easements. A SWMM model was received on June 17, 2005 and has not been fully reviewed. A complete review will be necessary. Typical sections for each house style must be submitted. Finally, grading work on the site must be coordinated between this project and Town Center Gardens to the east. Stormwater Analysis: The latest SWMM model shows an increase of 3.0 acre feet in the West Park pond. The pipe from the 8th, 9th, and l0th Additions is upsized to pass the 100-year event from these projects to the West Park pond. The change in pond level is approximately 0.1 ~'cet. Utilities: This subdivision will be served by sanitary sewer and city water services that will be extended into the development. The following sheet specific comments must be addressed: The pipe in the rear yards is shown as HDPE. Pipe that is located within drainage and utility easements must be RCP. Continuation references and sheet overlap must be provided as discussed on previous projects. These plans are the basis for the city as-built records that will be maintained for future reference on utility connections. Thc proposed watermain connection at Towfl Center Drive must be moved. The pipe .shown for connection will become a raw waterline in the future. The treated water line is east of the raw water line. The proposed stormwater treatment manhole must be sized for the entire development including Outlet A. Water, sanitary sewer and storm sewer will need to be extended from south of Bunker Lake Boulevard to serve this project. The utilities south of Bunker Lake Boulevard were included in the proposed assessments of the Master Development Agreement for Ramsey Town Center. Construction of the utilities must be coordinated with the city and conform to the assessment process. Assessments are addressed later in this letter. Sanitary sewer inverts have been checked from the existing pipes at Sunwood Drive to the project site. The inverts will provide services to the project. Submitted plans include storm sewer plans, not profiles; profiles must be shown on revised plans. -267-