When do the water rides at the Salt Lake City Lagoon open?

My older sister and I are bringing my cousins to lagoon as a late birthday present. We've already earned the money needed, but I was wondering, if we went on the 30th of May, would the water rides b open? If not when will they be?When do the water rides at the Salt Lake City Lagoon open?
Yes they will be opening the water on Memorial Day weekend!!!

YAY!!!!!!!!!!!!

myrtle

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