Next the existing waterfall by the "wading pool area" had to be changed so it faced the soon-to-be-pond. Previously it had opened out to the swimming pool proper. It was a mortared water fall, so the pond contractor had to chisel the rocks apart and re-build it.
Lastly, the little pool had to be drained and cleaned up. A silicone compound was applied to the plaster to seal it off. That was done so that algae would be less likely to grow.
When the surface was ready, the pond was stocked with plants and a dozen mosquito fish.
Read my article Water Gardening: 6 Reasons to Add a Pond to Your Back Yard