It's been a while, but this isn't the first time the Ottawa River has seen near back-to-back floods. As of Tuesday morning, the Ottawa River was flowing at a rate of 7,700 cubic metres per second at the Carillon Dam, just downstream of Hawkesbury, Ont. : 8,300 cubic metres per second (river flow prior to 1962 was measured elsewhere in the Hawkesbury area, as the Carillon Dam was not yet built). These high Ottawa River flows don't always result in the same flooding patterns, however. But in general, when it's that high, everybody's having trouble, everybody's seen flooding," said Ottawa River Regulation Secretariat senior regulation engineer Michael Sarich.

Source: CBC News April 23, 2019 16:53 UTC