This project was performed as a cooperative agreement between the U.S. Geological Survey (USGS) and the Massachusetts Office of Coastal Zone Management. Massachusetts Geographic Information System (MassGIS) personnel provided orthoimagery and metadata.

We thank several individuals from the U.S. Geological Survey Coastal and Marine Geology Program: Amy Farris for her work extracting the 2007 lidar shoreline, Jeff List for his helpful technical advice, Laura Brothers and Brian Andrews for technical reviews of this report, and VeeAnn Cross for reviewing the geographic information system data and metadata in preparation for this publication.