I am putting together a formal, above ground Koi Pond project that will of course require a formal spillway(s). I know enough about hardscaping to tell the difference between a brick and a paving stone... much less construction costs. I would appreciate some 'ball park' figures on the construction of a feature similar to the attached picture. The dimensions will be 6' tall x 1' deep x 5.5' wide. I will pour a concrete footing for the feature and install the plumbing and spillways as construction proceeds. BTW, the client is an engineer, so there will be an eyeball on detail and specs. Just some approximate figures will help immensely.