IMHO the cost is made up of building the dam, with good clay soil, the hardware and piping, then clearing the land where the pond will encompass. The size of the pond is not how it was quoted for me. The topography determines the size & depth (uless you have them dig it out, in which case your location for the pond is questionable) of your pond. Otherwise, the $ you were quoted sounds about right to me. Interesrlingly enough we saw ~ 50% reduction in the cost quotes from 2008 to 2011!