Outlet to lake
Inlet 2nd tank
Outlet to 2nd tank
First tank inlet
1000 Gal tank
This Installation set up of having plumbing underground has many advantages,  Tanks do not overfill and spill water to create mud holes.  Eliminates erosion around the tank area.  Prevents cattle from disturbing above ground plunbing.
Water is pumped back underground to stock tanks 50' away.
StuffBox
Cattle Guard
Wood punp rod
Control handle