I live in a city in Indiana that has a city ordnance that 5# or more of black powder must be keep in a powder magazine designed to contain an explosion forcing it to go up not out. Has anyone ran into this and how do you handle it. Building a 12" concret walled well with a wood roof is several hundred dollars if I could get a permit. This means I find black powder local or pay out the nose for 3 pounds or less shipped to me. I need some good ideas on how to handle having 4 pounds or more in house.