What is your project with taking a pond down? Is it to control weeds, to clean it...please get back to us.
How to take a pond out? or How to close off a backyard pond?
Where is the pond?
Please tell us a little more about your project so that we can try to offer you suggestions. Pictures would help illustrate what the situation is.
Best way is to call a pond shop and have them do it. They are good for cleaning and setting it up again in Spring.