Gypsum Mining Method Cost 911 Metallurgist
The first gypsum mill was constructed in 1872, 2 miles southeast of Fort Dodge. ... The National Gypsum Co. plant and quarry are about 3 miles south of Fort Dodge, Iowa, and embrace about 650 acres. Before 1944 the entire National Gypsum Co. output came from an extensive roomandpillar mine formerly owned and operated by the Universal Gypsum ...