Maintenance At Oahe Powerhouse To Force Flows Through Stilling Basin Starting Monday

(KCCR) — The U-S Army Corps of Engineers continues its weekly updates of conditions in the Missouri River basin. The river continues to see above normal runoff in part due to continued rainfall. Kevin Lowe with the National Weather Service’s Missouri Basin River Forecast Center says the rain chances in the basin continue for the next week…

“Friday and into the weekend, scattered thunderstorm activity is possible again, over much of the basin.  The heaviest activity will be in the Dakotas, Nebraska and Iowa with areal amounts approaching an inch and a half.  A front will set up over the southeastern portion of the basin early next week, bringing more organized, widespread rainfall.  Heaviest rainfall associated with this front will center on the state of Missouri, eastern Kansas and southern Iowa.  Areal averages could exceed five inches in some locations and this system does bear watching as we go Monday through Wednesday.”
Water in storage in the main stem system is down point-six million acre feet in the last week. Fort Randall reservoir is down point-six feet after an increase last week. Mike Swenson with the Corps Missouri River Water Management office says Lake Oahe is also dropping…

“Oahe reservoir is at elevation 1616-point-four, down point-three feet since last week.  The reservoir is eight-point-nine feet above the base of the annual flood control zone.  Releases from Oahe are currently about 57-thousand c-f-s and are expected to remain near that rate into September.”
Swenson says the water moving through the Oahe Dam will be taking a slightly different route starting next week…

“Next week, the Project will start maintenance on one of the hydro power units.  This means that although total releases from Oahe will remain the same, releases will exceed the capacity of the available hydro power units and supplemental releases will need to be made using the outlet tunnel.  Outlet tunnel releases will begin Monday morning.”
Next week will be the Corps’ final regular weekly update on Missouri River conditions. They will hold monthly updates beginning in September.