I am interested in constructing a pond as a neighborhood project. There has been talk and now I am looking into the details...

Basically we have a low lying "green belt" area that is basically a drainage area. Has about a 12' drop on 2 sides and then open on both ends... There is a pond about 1 miles upstream.

Question, where can I get cost estimates/ideas, and can anyone recommend anyone in or around the OKC area for me to work with?