Analysis of the deconstruction of Dyke Marsh, George Washington Memorial Parkway, Virginia-Progression, geologic and manmade causes, and effective restoration scenarios - Litwin, Ronald; Smoot, Joseph; Pavich, Milan; Markewich, Helaine W.; Oberg, Erik; Helwig, Ben; Steury, Brent; Santucci, Vincent; Durika, Nancy; Rybicki, Nancy; Engelhardt, Katharina; Sanders, Geoffrey; et al. (Open-File Report, 2011)