As is normal for this time of year, Pend Oreille PUD is keeping a close watch on the Pend Oreille River. Current snowpack levels for the Pend Oreille River drainage, which are the Upper and Lower Clark Fork Basins and the Flathead Basin, are 95 to 100 percent of average.
Property owners along the Pend Oreille River are encouraged to take precautions and prepare for possible flooding, including securing docks and boats. Peak river elevation for this year is expected to be sometime in late May or early June. “Unfortunately, we simply do not know exactly how high the river will rise or when peak flows will be reached”, said Terry Borden, the PUD’s Manager of Hydro Production at Box Canyon Dam. “When and how quickly the snowpack melts is determined solely by the weather”, he added.
Due to operational limitations, Box Canyon Dam is normally unable to produce electricity above 80,000 cubic feet per second (cfs). Power production at Box Canyon was shut down on April 29. As of May 1, river flow rates were between 78,000 and 81,000 cfs. The peak flow rate for 2011 was 126,000 cfs. During the flood year of 1997, the maximum flow rate was 140,000 cfs.




