5.6. PCSR 08-23-2005 - Laserfiche WebLink

Home Browse Search

I I I I I I I I I I I I I I I I I I I WWW.RYANCOMPANIES.COM RYAN COMPANIES US, INC. 50 South Tenth Street, Suite 300 Minneapolis, MN 55403- 2012 BUILDING LASTING RELATIONSHIPS IYAH 612-492-4000 tel 612-492-3000 fax 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. 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 germinating. 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 for the second story. This is done to prevent any natural disaster associated with rooftop flooding that could result from clogged roof drains. An internal roof drain system is provided for the westerly portion of the building roof over the office portion of the building. 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 roadway improvements to Waco Street and the extension of 182nd Street east of Waco Street. Target is proposing to over-size this pond in exchange for reduced stormwater trunk fees. Utility Design Due to the high electric power loads to power computers, the high demand for circulated cooling water (to keep the facility from over-heating), and the sanitary sewer loading from the blow-off of the cooling towers, the utility demands of this facility are substantial. These demands are summarized as follows: Electric Service Target will require that a total service load of 8,884 Kw /1 0,452KV A, 0.85 power factor be provided to the site by August 2006 for commissioning of the Technology Center. Upon completion in fall of 2007, The facility will require two feeds of 10KV nominal service to a disconnect location on site. Conduit from the disconnect location to the facility will be provided by the owner.