Data collecting for Envisioning change will include searching for historical photographs and ephemera related to sites vulnerable to sea level change. I first saw the historical photograph below in the exhibition Back Cove: Heart of Portland, curated by Carolyn Eyler in 2001. The photograph is of Marie C. Knudsen with her flock of ducks along Marginal Way, circa early 1900's. The Back Cove can be seen in the background; the shape of the cove has changed dramatically over the last century with human intervention signifcantly decreasing the size of the basin. When tides are high, cove waters now force their way back up through storm drains to reclaim their edge.
Marie C. Knudsen with her flock of ducks on Marginal Way
Back Cove Circa 1900-10
Collection of Earle G. Shettleworth Jr.
B & W scanned reproduction courtesy USM Art Gallery
This color photograph was taken during a high tide in October of 2010 close to where Marie Knudsen stood.
This GIS (Geographic Information Systems) map below illustrates the shape of the ephemeral pond that appears regularly when there is a high, high tide. The map was created by Nathan Broaddus, graduate student in the Muskie School of Public Service Community Planning and Development program. Data was provided by Sam Overlock, University of Southern Maine GIS student.
The blue area on the map shows the outline of the pond as traced on July 14th, 2014. The red outline was traced on December 4th 2013. The outline of the pond will be traced again during a King Tide event that will occur on October 9th, 2014.