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Delaware, United States of America (38.69205 -75.40133)
Delaware is on a level plain, with the lowest mean elevation of any state in the nation. Its highest elevation, located at Ebright Azimuth, near Concord High School, is less than 450 feet (140 m) above sea level. The northernmost part of the state is part of the Piedmont Plateau with hills and rolling surfaces. The Atlantic Seaboard fall line approximately follows the Robert Kirkwood Highway between Newark and Wilmington; south of this road is the Atlantic Coastal Plain with flat, sandy, and, in some parts, swampy ground. A ridge about 75 to 80 feet (23 to 24 m) in elevation extends along the western boundary of the state and separates the watersheds that feed Delaware River and Bay to the east and the Chesapeake Bay to the west.
Concord, Wilmington, New Castle County, Delaware, 19802, United States of America (39.76428 -75.54270)
Coordinates: 39.74428 -75.56270 39.78428 -75.52270 - Minimum elevation: -10 ft - Maximum elevation: 450 ft - Average elevation: 171 ft
Penn Acres South, New Castle County, Delaware, 19720, United States of America (39.67428 -75.58937)
Coordinates: 39.65428 -75.60937 39.69428 -75.56937 - Minimum elevation: -17 ft - Maximum elevation: 122 ft - Average elevation: 30 ft