Hearrell, McMahon, Bartholic, and Elm Springs supply water to the Neosho National Fish Hatchery. In 1888, Hearrell Spring, named after Lemuel B Hearrell, began supplying water to the newly built hatchery. In 1908, McMahon Spring was added to supply the hatchery's fish rearing ponds, after its condemnation under the governmental power of eminent domain. In 1964, after the closing of nearby Fort Crowder, additional water was supplied by Elm Spring and Bartholic Spring. With Hearrell Spring producing nearly the same volume of water as Big Spring, the combined flow of these four springs is about 2,000,000 gallons per day as it arrives at the hatchery. While Hearrell Spring arises at the hatchery, water from the other springs is piped several miles by pipeline from their origins to the hatchery.