We are working on a project in Michigan and have to ground our MDP (1600A) to the water main. This in itself is not an problem but what have people done if we wanted to use Aluminum conductor sized at 250? I know i can get a copper clamp for a 5" pipe but struggle to find anything bigger than a 4" clamp for 250 aluminum. I would like to find a solution for the aluminum so any thoughts or ideas from past projects would be appreciated. Thanks in advance.