"Several years ago, when I moved to my home on the Chesapeake Bay in Mathews County, I knew that I wanted to do something about the shoreline, which was eroding in a dramatic way. A ledge of soil and sea grass hung over the water, and each new tide and storm, it seemed, took more of the soil with it. Because the water is fairly shallow near the pier, low tides and winds create a high-energy impact on the shoreline. Storm tides wash more into the grass but then pull soil out as they recede."
Read the full article here: http://www.oystergardener.org/bridge-towers