The Denver Regional Landfill has minimums of almost $70 for dumping and around $35/piece for mattresses and box springs no matter what size. You also have to find a way to get it there! The worst part is mattresses take up on average
23 cubic feet of landfill space because they can't be broken down properly.
3 Alternative Mattress Disposal Methods in Denver
1. A Bedder World Mattress Recycling (Home Pick-up Service) www.abedderworld.com
There are a few mattress recycling businesses popping up in Denver that will take your old mattress and/or box spring. These companies will fully tear apart your old mattress and box spring and recycle 90% of the materials inside by making things like carpet underlay and dog beds. A Bedder World Mattress Recycling operates throughout Colorado as far south as Colorado Springs and as far north as Fort Collins. They allow you to book a home mattress pick up online. Their prices for pick up, removal and recycle start at $54 for any size mattress. See their full mattress disposal pricing list here. A Bedder World does not offer a drop off location.
You can drop off old mattresses for recycling at Springback Colorado 3875 Steele St Denver, C0. Springback will charge $15/piece and will charge you at the time of drop-off.
To do this all you need is an exacto knife and some space (things may get messy). Simply cut around the edges of the mattress until you can take off the cover. Inside you will find foam and metal springs. Separate the foam and metal. You can actually bring the metal springs to the scrap yard and they will pay you for them. As for the foam you can shred it up and use it in dog beds, to make pillows or you can find a local carpet manufacturer who may pay you for the foam so they can use it for carpet underlay (same process with the box spring).