After a major flood in 1933, some residents moved across the river.

In 1760 and 1780 two major floods nearly wiped out the city.

It changed to much of its present course in 1867 during a major flood.

Since 1986, there have been five major floods in western Washington.

The most recent major flood was in 1951, however that event did not cause as much damage.

The last two major floods were in 1993 and 1995.

March 14 and 15, 2010, has seen the only major flood in recent years.

Two most recent major floods occurred in 1999 and 2007.

Three major floods in recent history, 1998, 2002, and 2010, caused damage to the park.

They expect to be given 72 hours' warning of a major flood.