Not in this case, but I have indeed used hundreds of bags of pre-mix, restoring my two hydro dams nearby. Every village needs an idiot. In this case it was poured, with a 100-foot boom/pumper needed to reach the far bank. I designed the abutments and built the custom forms, then re-purposed the forms as pre-fab walls to build an addition on the house, for my daughter's room. Do concrete forms count as "special tools"?