The pic does look like a water way at first glance but it’s some sort of cinder block foundation or maybe a sistern used for holding water. Very hard to tell from the pic but it’s definitely a sign of human activity. No older than late teens but probably newer than that. Cinder blocks weren’t widely used before that.
Here it is .
In the back? Big foot
Sheep dip ramp. The tubes spray the chemicals to kill lice and ticks.
How to you make sheep dip? LOTS and LOTS of sour cream.
SageGrouse