Ashland topographic map

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A system of seventeen locks connects Lake Winnebago to Lake Michigan at Green Bay, an elevation drop of about 150 feet (45 m). This lock system is located along the lower Fox River and starts at the northwest corner of Lake Winnebago in the city of Menasha and ends at the mouth of Green Bay. One of the locks,…

Average elevation: 833 ft

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Jefferson's elevation is 797 ft (243 m) at the center of downtown.

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Orfordville is located at 42°37′45″N 89°15′24″W / 42.62917°N 89.25667°W / 42.62917; -89.25667 (42.629300, −89.256755). The elevation is 889 feet (271 m).

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According to the U.S. Census Bureau, the county has a total area of 464 square miles (1,200 km2), of which 456 square miles (1,180 km2) is land and 8.7 square miles (23 km2) (1.9%) is water. The Mecan River, Buffalo Lake, and Puckaway Lake lie within Marquette County. The highest altitude in the county is a…

Average elevation: 850 ft

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The uppermost lock and dam on the Upper Mississippi River is the Upper St. Anthony Falls Lock and Dam in Minneapolis. Above the dam, the river's elevation is 799 feet (244 m). Below the dam, the river's elevation is 750 feet (230 m). This 49-foot (15 m) drop is the largest of all the Mississippi River locks…

Average elevation: 666 ft

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