Lusk says that it is much less expensive to raise the dam than deepen the hole. Not much value in a 2 ft. deep pond.
If I were going to do it myself, I would probably break the dam. I don't really like that idea but not doing it might be a drought breaker.
I'm with Dave on this one. If the location is suitable raising the dam is a good choice. You'll get more surface area for prob. the same cost.
On DD1's second point breaking the dam would be a must for me. Keeping water out while the work is going on could save money & time. Like he suggests just as sure as you don't Murphy will bring on a monsoon!
