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Preliminary Site Plan Review -Suite Living at The COR <br />October 28, 2010 <br />Page 4 of 7 <br />• All landscaped areas, including the boulevard along Civic Center Dr., shall be provided with an <br />in -ground irrigation system, and be maintained by the property owner. <br />• A minimum of six (6) inches of topsoil that meets Mn/DOT's Premium Topsoil Borrow <br />specification must be installed over all disturbed areas not devoted to buildings, off-street <br />parking, driveways, sidewalks, patios or other such improvements. If amending onsite topsoil, <br />documentation must be supplied to the City certifying that the amended material meets this <br />specification prior to installation. <br />• Planting details/specifications must be included on the landscape plan and shall address among <br />other things: <br />o . Planting depth (1st set of primary roots shall be at finished grade) <br />o Only prune out dead/broken/deformed branches at time of installation <br />o Removal of upper portion of wire basket and burlap after being placed in planting hole <br />• At the time of installation, all shrubs must be at least twenty-four (24) inches in size (either height <br />or width, whichever is applicable per species). <br />• The landscape plan identifies areas to be covered with turf. Please note that sod is required for <br />turf establishment. Any alternative to the sod requirement requires City Council approval. <br />• Should City Council approve the use of seed rather than sod, details will be required outlining <br />application rate(s) and installation method. <br />• Upon acceptance of landscaping by City, a two (2) year maintenance guarantee is required to <br />ensure survival of plantings. <br />Please submit a revised landscaping plan that addresses these matters. <br />Tree Preservation: This site is devoid of any significant free cover and therefore, no tree preservation <br />plan is necessary. <br />Engineering Review <br />Reviewer: Tim Hhmner, City Engineer <br />thimnzertda ci ramsev.mn.as <br />763-433-9893 <br />The following comments are offered regarding the October 5, 2010 plans by Landform Engineering <br />Company: <br />Grading and Drainage: The building floor elevation should be set to be above the adjacent grade of the <br />public streets while meeting ADA accessibility guidelines. The grade from the building to the property <br />lines and extending to the limits of the shared accesses must be set to match the plans for the future <br />buildings and parking. <br />The COR Development utilizes regional stormwater ponds for rate control and water quality treatment. <br />Each individual site needs to provide additional water quality treatment through the use of rain gardens, <br />water quality treatment structures, or other BMP's. The plan is proposing to install a conventional storm <br />sewer system (inlet structures and pipes) with the east half of the site discharging to a proposed design on <br />the adjacent Residence at the COR property and ultimately to the public system, and the west half <br />directed into the public system in Sunwood Drive. Drainage calculations were received but additional <br />information. is required for the appropriate sizing of the proposed Aqua -swirl structures. The. AS-3 and <br />AS-4 devices may handle the water quality treatment flows; however, the outlet pipe sizes are 10"/ 12" - <br />respectively and do not match the design pipe sizes of 15" and 18" shown on the storm sewer plans; the <br />AS-7 and AS-8 devices have adequate outlet sizes and will provide treatment for up to the 10 year event. <br />52 <br />