Agenda - Council - 09/23/2003 - Laserfiche WebLink

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Preliminary Summary of City Engineer Plan Review Ramsey Town Center Plans Dated 27 August, 2003 Page 3 of 9 ~ o If it is platted then all trunk fee money is due and should be included in Development Agreement. · Well House# 3 o Access must be shown as being relocated · West Ramsey Parkway at Zeolite o Revise street grades in conjunction'with revision of location of ponding areas and installation of underpass for regional trail. The area between the streets is being platted as drainage and utility easement. Work also involves storm sewer revisions. A combination water level equalizer/trail underpass structure can be constructed by raising street grades slightly and revising pond contours. An at grade crossing connection shall also be provided by connection the path to the sidewalks installed adjacent to the Parkway. · East Ramsey Parkway at Rhinestone o See comments above for West Ramsey Parkway regarding trail underpass. Grading, Drainage and Erosion Control Plans The developer is asking for a grading permit in conjunction With Final Plat approval so that mass grading operations can commence soon. We have looked over the proposed grading and find that generally the slopes meet city standards. We did note that most of the proposed parking areas are designed with low areas for ponding, the slopes shown are in the range of 5:1 to 15:1 which is unacceptable across parking lots. The grading plan also had several building floor elevations that were lower than adjacent catch basins. Grades across the garage side of multi-family residential buildings are less than 1.0% in several areas. Buildings must be 1.5 ft above existing streets and must have positive drainage away from the building at 2% or greater. Slopes between 1% and 2% require a grading certificate of survey. Maximum slope for all grading is 4:1. The contours in the proposed parking areas do not indicate that curbs will be installed, however the city standard is for curb and gutter in parking areas. This will need to be addressed on the final plans. All proposed contours must be shown. Additional grading details must be provided for blending the grades along the north line of Outlot A'into the adjacent properties. Grading along Armstrong Boulevard is filling portions of the existing ditch without providing new outlets. Storm sewer connections or culverts will be required to maintain existing drainage patterns until Armstrong is reconstructed into an urban section. The pond in the south west corner of the site adjacent to Armstrong Boulevard is -20' lower than the road. The preliminary plat review identified this area as needing to be revised. A trail must also be installed along the east side of Armstrong boulevard which is not shown on the plans. The pond should be moved farther from the road so that the slope can be flattened or guard rails must be called out for this area. Grading along the northern edge of the railroad tracks covers the ends of several pipes that provide drainage under the tracks. These pipes must be extended or storm sewer provided to maintain drainage. The solution to this issue must be installed prior to blocking existing drainage patterns. Grading on railroad property requires a railroad permit. Grading in this area shall not occur until a copy of the permit is submitted to the city. Last printed September 15, 2003