We have two 250 gal cisterns here in the city. When we bought the house, there was a carport attached to the shed, with vertical posts all but rotted out = impending doom. So when we replaced the roof, we had them remove the carport roof altogether and I built a gate for alley access. Along with adding nice square footage to our backyard and a great place to do DIY build projects, it also served as a foundation for our 2nd barrel. Yay!