Alchemy Fabrication & Welding LLC. Construction Yard Alchemy Fabrication & Welding LLC. Request Info 401 Fender Lane Carbondale, Colorado 81623 (970) 376-3907 About Map About Alchemy Fabrication &Welding is a small Fabrication and welding outfit serving the roaring fork valley. We specialize in all things steel construction from structures to ornamental steel. What's Nearby? Distance: 5 10 15 20 25 50 mi.