5.3.&5.4. PCSR 08-23-2005 - Laserfiche WebLink

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requirements for parking/loading areas abutting residential zoned property. No berming is provided on the north and east sides of the site as these face internal parcels within the Business Park where screening is not required. Trash Enclosures The site plan proposes to store a compactor and dumpster in one loading dock berth within the service area. The service area will not be visible from outside the security wall. Above Ground Tanks The plan proposes six cooling towers arranged in a grid pattern two units wide by 3 units deep. Details for the cooling towers are provided in the plan set, and the cooling towers are shown on the proposed building elevations as well as the perspective drawings. These towers will be set on pedestals approximately 7-feet off the ground for a total height of approximately 31-feet.. The plan also proposes a water cooling tank that will be approximately 40 feet in diameter and stand approximately 45 feet tall. Both the cooling towers and the water tank will be located within the service yard area behind the 10-ft high screening wall. Subsection I. Grading, Drainage and Erosion Control The on-site soils are superb for construction, and given the extensive greenspace with which to work, as well as the ability to expand the size of the pond, or increase the volume of the berms, we are confident that we will be able to reach an on-site earthwork balance. Parking lot slopes are all within 1.0% minimum and 3.0% maximum. Earthen slopes are designed to be 4:1 or flatter, and will be sodded or seeded to minimize any erosion potential. The swale along the east side of the site will be anchored with temporary wood mulch fiber blanket, and bio-roll check dams will be used to control temporary erosion while seed is taking. Roof drainage will be directed through scuppers and downspouts on the exterior of the building wall to a subterranean storm sewer system. There will be no internal roof drain system. This is done to prevent any natural disaster associated with rooftop flooding that could result from clogged roof drains. The stormwater pond on-site will be designed to handle the 100-year back-to-back storm event, and will retain all stormwater on site. Soils are excellent for infiltration, and therefore the pond may not hold a permanent pool under dry conditions. The pond is proposed to be over-sized to provide capacity for stormwater from the City's proposed off-site improvements to Waco Street and the extension of 182ud Street east of Waco Street. Target is proposing to over-size this pond in exchange for reduced stormwater trunk fees. Subsection J. Utility Design Due to the high electric power loads to power the computers, the high demand for circulated cooling water to keep the facility from over-heating, and the sanitary sewer loading from the blow- Sherburne County page 6 Project Plan for Target Technology Center