Solid Waste Management Large Item Pick-Up Schedule: Denver Waste Management collects unwanted large items such as furniture and mattresses from our neighborhood every five weeks. Place your item(s) next to (not leaning against or in) the dumpster in your alley by 7 AM on Monday of the weeks of Nov. 18-22, and Dec. 23-27, 2002. Please note: pick-up service is delayed one day when the Monday of the collection week is a holiday! For questions about solid waste removal, call 720/865-6900.