We started digging out a pit for the greenhouse with our tractor. We accomplished a certain amount of work, but all of the fine tuning, and digging of a trench for the footers needed to be done by hand. This involve excessive amounts of pick-axing, and shoveling out chunks of frozen earth.
It took the better part of a month, and the help of friends, but what an accomplishment!!! After digging out little tunnels for water lines and electric to go underneath the footer, and installing some rebar, we were finally able to contract a delivery by cement mixer to pour the footers.
After all the work digging out the trench for the footers, it only took 15 minutes to pour and level the entire foundation.
And then.... It snowed for the next 3 weeks.