River flows below Minidoka and Milner dams near Heyburn, Idaho were increased
Tuesday (Feb. 7) to accommodate high inflows from the surrounding areas because
of increased low-elevation snowmelt from recent warm temperatures and rainfall.
flow below Minidoka Dam was at 525 cubic feet per second (cfs); it was
increased in four increments to ultimately reach a target outflow of 2,420 cfs
by 5 pm. The flow below the Milner powerhouse was at 500 cfs; the discharges
increased to approximately 1,500 cfs around noon Tuesday, to 2,500 cfs at about
3 pm, and to around 3,000 cfs at approximately 6 pm.
increases in discharges are necessary because of increases in Snake River
inflow from localized runoff from rapid snowmelt and to maintain stable
reservoir pool elevations at both dams. When the river inflows begin to
decrease later this week, the discharges from both dams also will be decreased.
winter flows released from Minidoka Dam are approximately 520 cfs. The
scheduled release Tuesday reaching 2,420 cfs is lower than the typical summer
time irrigation season flow of 12,000 cfs.
river and reservoir data are available at www.usbr.gov/pn/hydromet/uppersnake/
dams, which are operated by the Bureau of Reclamation’s Upper Snake Field
Office, are located on the Snake River in south central Idaho.