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The Upper Mississippi River is the portion of the Mississippi River upstream of St. Louis, Missouri, United States, [1] at the confluence of its main tributary, the Missouri River. [citation needed] Historically, it may refer to the area above the Arkansas Post, above the confluence of Ohio River, or above Cape Girardeau.
The Upper Mississippi water resource region is one of 21 major geographic areas, or regions, in the first level of classification used by the United States Geological Survey to divide and sub-divide the United States into successively smaller hydrologic units. These geographic areas contain either the drainage area of a major river, or the ...
The Mississippi River System, also referred to as the Western Rivers, is a mostly riverine network of the United States which includes the Mississippi River and connecting waterways. The Mississippi River is the largest drainage basin in the United States. [3] In the United States, the Mississippi drains about 41% of the country's rivers.
List of crossings of the Upper Mississippi River. The inland and intercoastal waterways, with the Upper Mississippi highlighted in red. The first bridge (and only log bridge) over the Mississippi, about 25 feet west of its source at Lake Itasca. This is a list of all current and notable former bridges or other crossings of the Upper Mississippi ...
Part of that history is the formation of the Upper Mississippi River National Wildlife and Fish Refuge, the subject of my latest story. This month, it's celebrating its 100th birthday.
Infographic explaining the hierarchy of the United States hydrologic unit system. Originally a four-tier system divided into regions, sub-regions, accounting units, and cataloging units, each unit was assigned a unique Hydrologic Unit Code (HUC). As first implemented the system had 21 regions, 221 subregions, 378 accounting units, and 2,264 ...
The Mississippi River has the world's fourth-largest drainage basin ("watershed" or "catchment"). The basin covers more than 1,245,000 square miles (3,220,000 km 2), including all or parts of 32 U.S. states and two Canadian provinces. The drainage basin empties into the Gulf of Mexico, part of the Atlantic Ocean.
The flood between May and June was the second most severe flood in the lower Mississippi Basin since 1927. Red River Landing, Louisiana, reached the 4th highest crest of record at 60.52 feet (18.45 m) on June 5 and was flooded for 115 days. All bays of the Bonnet Carre Spillway were opened for 35 days.