Remember last summer? Yeah, I agree...what summer?? It rained for two months straight. All of June and July, save I think three (count them) days, were rainy. So our community garden was a duck pond. And we lost a lot of topsoil with all the flooding.
So this year we've been making raised beds. Here's the old adage "Many hands make light work" in action.
We also dug a drainage trench across the entire garden and filled it with stray rocks to divert the rainwater. And we're building a bridge across it so it won't be necessary to walk in the wet areas, which creates more problems with mud. Though not everyone thinks mud is a problem: