126. 



mine near Lyons 993' deep working a bed 8 1/2' thick. The space 

 mined out is about 100 acre-feet. 



Several other mines are either closed down or have been abandoned. 

 The largest is owned by the Morton Salt Company near Kanopolis and 

 was closed in 1948. It is thought to be still dry. Depth to bottom is 

 810' and the volume mined out is about 1500 acre -feet. The average 

 ceiling is about 9' • The Carey Salt Company has a shut-down mine at 

 Lyons closed in 1948. Its depth is 1024' average ceiling 10', and the 

 volume mined out is about 1000 acre -feet. 



The three producing mines produced 534,658 tons of rock salt in 1954. 

 This is equivalent to about 185 acre-feet. Assuming an average thick- 

 ness mined of 10' and 50% left for pillars, the area mined out would be 

 about 37 acres . 



5.5 Salt is produced in Louisiana from four mines/ 1 "' The Interna- 

 tional Salt Company has a mine at the salt dome at Avery Island, Iberia 

 Parish. The rock salt was first discovered at a depth of 18' below the 

 surface. The present mine was opened in 1898 with a shaft 518' in 

 depth. 



At the Jefferson Island salt dome, where the mine is operated by the 

 Morton Salt Company, a circular shaft has been sunk to a depth of 

 900'. Myles Salt Company produces salt at the Weeks Island salt dome 

 from a shaft reported to be 645' in depth. Carey Salt Company is min- 

 ing salt from the Winfield salt dome, Union Parish, from a depth of 

 838', The shallowest depth at which the salt has been found in this 

 structure is 437'. Rooms are 50' in width and 20 to 80' in height. Min- 

 ing began in 1931 and the production for several years averaged about 

 60,000 tons annually, increasing to -120,000 tons in 1941. Recent fig- 

 ures of the individual mines are not available. 



5.6 In Texas , the Morton Salt Company, Grand Saline, Van Zandt 

 County, has a shaft to a depth of 700', which enters the salt at 213'. 

 Rooms are 60' wide by 80' high. The production is about 1000 tons per 

 day and 100 acres has been mined, V 1 "' 



The United Salt Corporation operates a mine on the Hockley dome, 

 Harris County. The shaft is 1525' deep. 



5.7 The total estimated production of rock salt for 1953 by states is 

 shown in the accompanying Table II . During that year, about 145 acres 



