Biddeford, ME Coastal Erosion Rate
Shoreline change 1.1 miles northeast of Biddeford, ME
The coast 1.1 miles northeast of Biddeford, ME shows no statistically significant trend either way. USGS's transects measured a rate here, but it's smaller than the survey's own margin of error for this stretch, so calling it "eroding" or "growing" would overstate what the data actually shows.
The grain of this number
Nothing here is parcel-level. USGS's raw transects run every few hundred feet along the shore; this page averages the ones nearest Biddeford, ME into one ~3.5-mile reading rather than picking a single arbitrary line to represent the area. Centered near 43.45°N, 70.38°W. The survey behind it runs to 2007-2009, in USGS's New England / Mid-Atlantic assessment, using the LRR method. Shoreline surveys aren't repeated every year, so this is the most recent long-term measurement USGS has published for this coast, not a live reading.
Where this fits nationally
68 transects feed this segment's number; 34% of them individually measured retreat. Uncertainty on this specific number: 0.27 ft/yr either side. Taken at face value, this segment's raw 0.14 ft/yr reading would land it 883 of 1211 nationally - a number worth ignoring, since it's statistical noise rather than a real trend. Source: USGS Open-File Report 2010-1119. For scale: Inwood, NY, 266 miles away, ranks 1043 of 1211 nationally for growth, 0.59 ft/yr. Biddeford, ME, 1.2 miles off, is the adjacent measured stretch, itself no significant trend.
Biddeford, ME on the source map: try the Coastal Change Hazards Portal, zoomable well past this page's ~3.5-mile grain.