b'TERMINALSMEM 11Contech supplied two diameters of pipe (120-inch and 84- Sparkes adds that centralizing deicing operations inherently inch), and nested the smaller inside the larger for transport topromotes efficiency. Taxi time and holdover time are elements reduce the number of trucks delivering materials to the jobsite.of cost for airlines, he explains. There are a lot of benefits to The 120-inch diameter pipe was supplied in 40-foot-long pieces,having a centralized facility on an airfieldincluding promoting the and 84-inch pipe in 48-foot-long pieces, to minimize the numberflow-through of traffic and the ability to push of joints for the system. Joints were internally welded with anaircraft at all times. HDPE extrusion weld technique, and the large diameter pipe wasRichard Kelsey, deicing program manager backfilled using rushed up concrete removed from another partfor FedEx, notes that having a uniform size of the airport. Walton notes that both of those strategies helpedand layout for the bays also provides a major save money. advantage. Because MEM doesnt typically The pavement for MEMs new deicing facility requiredget the snow and other winter conditions about 350,000 square yards of Portland cement concrete andthat airports further north deal with, groundRICHARD KELSEY150,000 square yards of asphalt. The large, impermeable surfaces increase stormwater runoff throughout the year, not just during deicing season. As such, Kimley-Horn worked with the citys stormwater group and civil engineering department to manage the additional runoff to stormwater systems, and eventually streams and rivers. The design team created a clever system that uses the new glycol detention vault for stormwater detention in seasons that arent impacted by deicing product runoff. When it rains in the summer is when youll see maximal stormwater runoff, explains Nathan Lemon, P.E., a civil engineer with Kimley-Horn. So, we ended up dual-purposing this vault and using it to control that stormwater outflow from the site. NATHAN LEMONDeicing ReimaginedIn terms of efficiency, both the location and design of the new CDF will help streamline air carrier and cargo operations and reduce the frequency of associated cancellations and delays. Locating the new facility on the south end of the airfield, closer to where aircraft take off on MEMs three north-south runways, reduces the need for repeated deicing. The FedEx Hub and all the commercial airlines are toward the northern side of the airfield, explains David Sparkes, P.E., senior aviation project manager at Kimley-Horn. A lot of times, they were deicing aircraft at the ramps or other locations and, by the time theyDAVID SPARKEStaxied all the way down to the south end to take off, they were collecting ice again.AirportImprovement.comMarch | April 2023'