There was a discussion of wetlands at the Lions Club property and whether they were ever delineated at last Thursday's BoS meeting. I remembered seeing a drawing depicting wetlands and it took some digging, but I found this from way back in 2010 when the Town had proposed a site plan for the future development of the Lions Club property. Not the best picture, but Town Engineer KV Partners noted the areas outlined in green to be wetlands and the small area in red as areas proposed to be filled in if the project went forward. As you can see, a good chunk of the 18+ acres is indeed wetlands. I don't recall who delineated the wetlands , but we did spend a fair amount of money in 2009 to study the property. I do know that no NH DES permits were sought.
In addition, numerous test wells were dug on the property and the water table was only about 42" below the surface in the area ( shaded) where the soccer field was proposed.
The Community Garden to my knowledge has not experienced issues with water runoff or flooding save for a few plots that do not drain well and after heavy rain are very muddy.