Agenda - Council - 07/27/2004 - Laserfiche WebLink

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Town Center 4th Addition - Final Site Plan/NAU July 23, 2004 Page 2 of 5 RTC has created a master stormwater treatment plan for the area and is providing stormwater ponds for all properties in the development. Each individual developer is responsible for providing an on-site Best Management Practice (BMP) to complement the overall stormwater plan. This BMP must be approved by the city and can take the form of a pre-treatment chamber, ie. Stormceptor, Bay Saver, vortex separator, etc., porous pavement or other treatment measure. The plans prepared by Plowe Engineering, Inc. dated June 23, 2004 show a Baysaver Device. Sheet 2 shows generic details for this brand of device. Detailed plans and calculations for this device and this site must be submitted. There is a storm sewer stub provided from Sunwood Drive. The plans for this development and~ the preliminary plans for Outlot A of this plat both show connection to this stub. Sunwood Drive will be a concrete street so connection to the structure in the street will not be permitted after the street is constructed. The storm sewer plan must anticipate connection of storm sewer from Outlot A and a stub must be provided for this future connection. The Baysaver device must be sized to provide coverage fbr Outlot A also. The straight line grade to the overhead door from 145th Avenue is 15%. The access crosses a public sidewalk, thc maximum slope across sidewalks is 2.0%. This area must be revised. URS sheet 5/17 must be updated to reflect this driveway access. The curb openings to 145th avenue on sheet L1 show a 6' radius l¥om the street. This must be revised to a 15ft minimum radius as shown on the URS Plans. This will require updating the site plan to show a new radius connecting the curb on the plat to the street. The spot elevation of 868.50 at the north property line and east curb line of the parking lot indicates a low area with no catch basin. Please verify the spot elevations. Spot elevations must be labeled as to location, ie. Top Curb, Gutter, Sidewalk. The adjacent streets are under construction at this time so establishing existing grades is a difficult process. The grading plan must show the proposed street grades per the approved construction plans and the proposed grades per the plan under review. Line weight and screening should be used to differentiate the existing from the proposed on the plans. The current plans are all the same intensity and difficult to interpret. The notes on Peridot Street and Sunwood Drive indicates "Proposed street and walk by others" and must be revised to read "Proposed street by others." As originally conceived, the final sidewalk and streetscape was to be the responsibility of the secondary developer per the RTC Master Development Agreement. However, staff has received notice that RTC LLC will be responsible for this installation. Please verify with staff on who will be responsible for installing the sidewalks and streetscape. The grading plan has a note stating sidewalk grades may be above building slab elevation. Positive drainage away from the building must be provided in all locations. The building plans must include a flashing detail fbr areas where the outside grades are higher than the floor slab. The flashing detail must be approved by the Ramsey Building Official.