Fluid motion was never my specialty, so the real feat here will be to ensure that the water runs toward the pond as realistically as possible. 

Above and left were the preliminary shots showing the pond liner cut into strips and roughly placed into position. The seams were sealed with duct tape and spray-on undercoating. I worked on 2 or 3 foot sections at a lime, depending on availability of stone, the weather and how my knees felt! The stone was from a couple of local construction sites and includes shale, sandstone and something close in hardness to granite. I applied a thin coat of mortar and placed relatively flat stones for the base, then built up the sides.

The pictures attempt to show the creek dry, left, and with water, right. The concrete arch culvert hides the head of the stream, or where the recirculating pump dumps it from the pipe to the creek. At right, the creek follows the right-of-way and is in the midst of the plants. We're looking upstream, but progressing downstream.
We've crossed under the tracks again, passing the barn and heading toward the culvert, left, that takes the yard lead across the creek. The moss on the right side was relocated from elsewhere in the yard.
From the culvert we're into the mill pond. The dam has a cut for a millrace on the left, and the overflow in the center. The wall along the left side will be the location of the mill and waterwheel (when I save up enough to get the GardenTexture kit.) The dam and wall are concrete, with a masonry veneer applied. The stonework was achieved using the back of a sheet of Precision Products stone wall for a mold. At left shows deep cut heading toward the waterfall.

Below shows the waterfall dry and wet! There needs to be a little more fiddling around to achieve better distribution of the water. Eventually!!

Some rebuilding took place in 2015 as leakage had gotten to be a concern.  

The stones lining the bed were removed and re-cemented into place.