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May 30, 1974 (Des Moines: Polk: Training site for black officers in World War I. 8: George M. Verity: George M. Verity (towboat): December 20, 1989 (Keokuk: Lee: One of three surviving steam-powered towboats in the United States, this ship pioneered on upper Mississippi in a certain way, leading to large private industry.
This is a complete List of National Historic Landmarks in Minnesota. The United States National Historic Landmark program is operated under the auspices of the National Park Service , and recognizes structures, districts, objects, and similar resources according to a list of criteria of national significance. [ 1 ]
Three cities (New York City, Philadelphia, and Boston) have enough listings to warrant lists separate from their respective states. A small number of designations have been made outside the 50 states. Most of these appear in United States possessions.
The following are approximate tallies of current listings by county. These counts are based on entries in the National Register Information Database as of April 24, 2008 [2] and new weekly listings posted since then on the National Register of Historic Places web site. [3]
Iowa: Private One of the few essentially natural glacial pothole lakes remaining in Iowa. Cayler Prairie: 1965: Dickinson: State An example of the increasingly rare virgin prairie grassland. Cold Water Cave: 1987
Map of the United States with Iowa highlighted. Iowa is a state located in the Midwestern United States. As of 2010, there are 943 incorporated cities in the U.S. state of Iowa. According to the 2020 United States Census, Iowa has 3,190,369 inhabitants and 55,857.13 square miles (144,669.3 km 2) of land. [1]
According to the 2020 United States census, Minnesota is the 22nd most populous state with 5,706,494 inhabitants but the 14th largest by land area, spanning 79,626.74 square miles (206,232.3 km 2) of land. [1] Minnesota is divided into 87 counties and contains 853 incorporated cities, with populations ranging from 425,115 (Minneapolis) to 12 in ...
The Jordan Aquifer is the largest source of groundwater, extending from northeast Iowa to south central Iowa, and is ultimately the source of much of Iowa's agricultural and industrial water. In addition to pollution threats, the aquifer is threatened by overuse in well-source irrigation, ethanol production, and the diminishment of resupply ...