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Big Spring is one of the largest springs in the United States and the world. [2] An enormous first magnitude spring , it rises at the base of a bluff on the west side of the Current River valley in the Missouri Ozarks .
The majority of these springs have been measured less than 10 times, at random intervals. The exceptions are Big Spring, Greer Spring, Mammoth Spring, Bennett Spring, Maramec Spring, Alley Spring, and Round Spring, which have all been measured for more than 3 years on a daily basis by the United States Geological Survey (USGS).
Its headquarters are in Rolla, Missouri. Some unique features of the Mark Twain include Greer Spring, which is the largest spring on National Forest land and part of the Eleven Point National Scenic River with an average daily flow of 214 million U.S. gallons (810 million liters). [3]
Other notable springs to add to the river include Cave Spring, Pulltite Spring, and Round Spring. Downstream from the headwaters approximately 52 miles (84 km) the Current River receives its largest tributary the Jacks Fork from the west near the small town of Eminence , Missouri.
In another dispatch from the road, hiking columnist Susan Anderson discusses her visit to Mammoth Spring in this week's column.
The spring itself cannot be viewed at the Mammoth Spring site because its mouth is more than 21 m (70 ft) below the surface of the large spring pool. Nine miles northwest of Mammoth Spring, visitors can see a portion of the underground river that feeds the spring at a collapsed cave in Grand Gulf State Park in Missouri. The remains of a portion ...
Greer Spring is a first magnitude spring located in the southeast portion of the Ozark Plateau, in Oregon County in south-central Missouri within the boundaries of the Mark Twain National Forest. The spring is the second largest spring in the Ozarks , with an average discharge of 360 cubic feet (10 m 3 ) of water per second. [ 1 ]
Maramec Spring is located on the Meramec River near St. James in the east-central Ozarks of Missouri. The fifth largest spring in the state with an average discharge of 153 cubic feet (4.3 m 3 ) of water per second, it is part of a Karst topographical area , with many springs and caves.