Things you'll need,
- Snow of the right consistency. Not too dry, not too wet. Packable.
- Cool temperatures. This arch was built in warm temperature, which led to its short life of about an hour.
- Support braces. We used a series of sawhorses, boards, and snow.
- Block mold. We used kitty litter buckets. It should have flat sides and have a slight taper.
- Some sort of scrapping tool.
Snow Arch from Paul Maiorana on Vimeo.