Maximum discharge on the river today is recorded at the Yakima River Above Ahtanum Creek At Union Gap with a streamflow rate of 2,080 cfs. This is also the deepest point on the Yakima River, reporting a gauge stage of 40.47 ft. This river is monitored from 4 different streamgauging stations along the Yakima River, the first of which is perched at an elevation of 1,338 ft, the Yakima River At Umtanum .