I have learned that for pond construction builds to look great and strive for efficiency, I need to hand-select almost all my rocks for the project. On smaller projects where we may be using only three to five semi loads, these rocks can normally be selected by walking around the stone yard or quarry, identifying the specific rocks we want and tagging them in a way that the vendor can easily identify them.
However, when rock and boulders are spread over a large supply yard, is scattered over multiple yards, or is still sitting in its original location in a field or woods, overhead images are immeasurably useful in quickly and accurately conveying essential details, like which specific rocks are desired and their location.
In the case of a large and expansive stone yard, I normally take aerial images of the entire yard or large portions of it. Then, I indicate with bright-colored arrows on the photos where the tagged rocks are located. I also supply images of the specific rocks or groups of rocks that I would like to set aside for my project. Keep in mind that when you are looking for a large number of specific rocks scattered over a large stone yard or area, you must allow time for the vendor to access them, collect, stage and ship them. This does take time, and you will need to plan ahead.
Depending on the scale of the project and the variety of the rock you have purchased, your material-staging areas could be quite spread out. As an example, on a project for the Arkansas State University football stadium, we needed to use several different rock storage areas that were spread over a couple of acres and a good distance from the actual waterfall locations. So, we segregated the rocks by length and general thickness, and within those groups, we organized them by the degree of their unique weathered character. We also took time to stage the best of the best rocks in the position we intended to install them, such as vertically, paired up with another rock, laid flat, and so forth.