Maximum discharge along the river was observed at the
Yakima River Above Ahtanum Creek At Union Gap
with a streamflow rate of 7,410 cfs.
This is also the deepest point on the Yakima River, with a gauge stage of
43.14 ft.
This river is monitored from 4 different streamgauging stations along the Yakima River, the highest being perched at an elevation of 1,338 ft, the
Yakima River At Umtanum
.