The person can be seen at the bottom of the red line.
The trucks also give an idea of the scale of the drop in the level of Lake McConaughy

Image © D. Gutzmer, Kingsley Dam at Lake McConaughy, June 2006: High Plains Regional Climate Center.
The top of the white colored rock indicates the height of the standing water under normal conditions.

NOTE:  The reservoir (lake) is full when the water reaches the level of the horizontal boom
which connects the outlet tower on the left and the spillway tower on the right.