Once in a while I am lucky to see water running down this "staircase" of flat rocks. Usually it is dry, since the water only runs after heavy rain or snow melt. The water disappears into a large pile of rocks, leaving the ground dry. I have described it before (5/29/2013). This afternoon I was out for a walk, and I heard the water running.
The stream is visible as a bright little waterfall just below the top of the staircase, and drips off larger rocks near the bottom. It is easier to see in this video.