This cost model itemizes +/- 15% cost estimating data on the costs of constructing and or upgrading / revamping airport runways, taxiways and aircraft parking stands and ramps. The cost benchmark model also includes square foot / square meter unit costs for constructing new terminals and departure gates and costs associated with , escalators, baggage carousels, aircraft fueling systems & waste disposal systems. The cost model is based on a (6) gate(s) 650,000 to 850,000 passengers per year terminal operating in the order of 15 to 25 departures per day.