There are plenty of questions still to be answered about a proposed floodwall that would run from Park Place to the BNSF Railroad bridge in Riverside. Exactly where will it be? Will private property need to be acquired, and how? How high will the wall be? What will it look like? What kind of floodgate will be installed at the Forest Avenue bridge? What is the visual impact? What exactly is the final cost going to be?

But lost in all of those questions is a fundamental one. Why is it needed?

The answer is in dozens of photos that have been published by this newspaper and elsewhere documenting the damage that flooding has done to the Groveland/Forest/Lincoln/West area in Riverside over the years.

It’s in stories of people who watched their Christmas decorations floating away in flood waters and memories of having their possessions destroyed.