I have a friend who bought a property with a pond. They are considering enlarging the pond. They may need to drain it to do so.

I am wondering if someone can refer me to some people that may do the following:

1. Look at pond.
2. Determine if it needs to be drained to be enlarged.
3. Once drained, enlarged and refilled with water; advise on how to stock it.

By the way; we are not sure that there is a natural spring.

Thank you for all replies.