Ocean City and Assateague Island
Sand reorgization problems
Ocean City has been losing a lot of sand, which means there probably wont be anymore beach within 100 years. But if they keep bring more sand up from the ocean then it will keep temporarily fixing the problem. But if they bring a ton of sand into Ocean City then they wouldn't have that much of a problem.
Assateague Island has moved a lot since it was discovered. Which means the sand has eroded a lot. Other problems that have occurred is the hurricanes taking the sand away and the water waves/tides taking the water. They just need to put up huge rock barriers and tons of sand needs to brought in.