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Big South Fork National River and Recreation Area Flood Plains
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Nature
Floodplains have not generally been delineated in the National Area; however, in the headwater areas, slopes are steep and floodplains are not well formed. Minor floodplains generally occur the farther downstream one proceeds. Several recreation sites in the main gorge are in the 10-year floodplain.
Maine ocean islands provide the only nesting sites for Atlantic puffins in the United States. Eastern Egg Rock in the midcoast region, Seal Island and Matinicus Rock at the mouth of Penobscot Bay, and Machias Seal Island and Petit Manan Island off the downeast coast provide habitat for more than 4,000 puffins each summer.