Weedy,
If you look a little south and west, you'll find Chaparral (my neighborhood lake). They have them too. I would call them piers or docks more than anything else. People tie up their kayaks, paddleboats, canoes or whatever to them. Many just sit on 'em. They do make great casting platforms as well.
My buddy has a house on one of these neighborhood lakes a little further south. I went out on the dock to fish a bit (the night I stuck a streamer in my head) and when I dropped my leech in the water and was stripping out line, a HUGE rainbow swam from under the dock to investigate. Didn't catch him, but I will never again pass up a chance to cast at these docks when I'm drifting by.