Short answers, pulled from the story.
Big Spring is a natural exit point where groundwater emerges from an aquifer to the surface, and it was documented by a team of geologists in Missouri on the 1st of January 1982. This spring discharges nearly 100,000 gallons of water every minute, creating a force of nature that has shaped civilizations for millennia.
The Missouri Department of Natural Resources classified springs by their discharge on the 3rd of June 1982, defining first-magnitude springs as those that discharge water at a rate of at least 2800 liters per second. This classification system ranges from first-magnitude to zero magnitude, with first-magnitude springs discharging more than 100 cubic feet per second.
Springs that contain significant amounts of minerals are called mineral springs, while springs without such mineral content are sometimes distinguished as sweet springs. Springs that contain large amounts of dissolved sodium salts, mostly sodium carbonate, are called soda springs, and some springs may be colored by minerals such as iron or tannins.
On the 2nd of May 1536, Spanish missionaries utilized spring-fed acequias to irrigate crops in lands that had previously been too dry for agriculture. These springs formed through a complex process where groundwater travels through a network of cracks, fissures, and caves known as karst topography.
On the 5th of August 1982, a historian documented the ancient practice of sacred springs where small bodies of water emerging from underground were revered in religious contexts from Christian and pagan traditions to the lore and mythology of ancient Greece. The Corycian, Pierian, and Castalian springs were storied in Greek mythology, while in medieval Europe, pagan sacred sites frequently became Christianized as holy wells.
On the 6th of September 1982, a report on geothermal energy highlighted how hot springs with water temperatures greater than human body temperature have been used as a heat source for thousands of years. The geothermally heated groundwater that flows from thermal springs is usually in the range of 37 degrees Celsius, but they can be hotter, and those springs with water cooler than body temperature but warmer than air temperature are sometimes referred to as warm springs.