Agenda - Council - 11/22/2005 - Laserfiche WebLink

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The illleadow: Preliminary Plat Review November 17, 2005 2 of 5 r Other Lot Requirements: The lots were designed with a minimum width of 70 feet, versus the standard 80 feet required in City Code, This may be allowed if the request for rezoning to. PUD is approved. The existing trail easement along Alpine Drive must be preserved. There is an existing easement for the .overhead power lines along Alpine Drive that is shown on the plat. The building pads must be outside of these easements. Traffic analysis Report: The City Charter requires a traffic analysis report for this development. The report is being generated but is not completed at the date of this writing. It is anticipated that the traffic analysis will be available by November 22 and that the impacts will not be significant. • Grading and Drainage plans: The grading and drainage plans have been reviewed. The following items need to be addressed. The plans sheets provide adequate overlap between sheets, addition of match lines will aid in reviewing the plans. Lot 21, Block 1 does not meet the required minimum slope of 2.0%. The back yard grading along Alpine Drive should be reviewed. The rear yard catch basins are close to the house pads and only serve the western most lots. The existing trail could be removed and replaced closer to the right-of-way to allow grading of this area. 0 The construction entrance will not be permitted at the location shown. The City of Ramsey does not require rock construction entrances as they are ineffective with the native soils. The erosion control plan must be revised to require daily sweeping of adjacent streets during active construction and as directed by the City. The drainage from the back yards of Block 3 is directed off site without rate control. The drainage from the back yards of Block 4 is also directed off site without rate control. Ponding basin No. 1 has a standard outlet pipe and a second pipe as an emergency outlet. The City would prefer to not have duplicate pipes. Please investigate the potential of installing a second outlet structure. with a rim elevation. of 879.0 on the outlet pipe. The pipes downstream of this structure could be upsized to provide capacity for the emergency overflow. Separation must be provided between the inlets and the outlets of both ponds to prevent short circuiting of the water and to provide maximum treatment. The outlet pipe from Ponding Basin No. 2 is directed off site to a pond in a drainage and utility easement. The emergency overflow shown does not discharge to a drainage and utility easement. Ponding basin No. 2 and the existing pond must provide storage for back to back 100 year storms with out discharge. • —260—