December 5, 2015 - December 13, 2015
(nine-day storm), a period of record-breaking rainfall for Portland
11 outfall pipes discharged combined sewage intermittently to the Willamette River on December 7, 8 and 9
Total time of discharge over the three days was 15 hours, 36 minutes
Total volume discharged was 638 million gallons, a higher than normal amount that reflects the very intense and long-lasting rainfall from this storm
See Storm Notes for more information on recent rain events in Portland.