 |  | The mine shaft installation progress reached the top of the salt at around 1000 feet as shown in this historical picture. This picture dramatically shows the interface between the overburden caprock also known as anhydrite and the salt also known as halite. Actual mining takes place near the 1500 foot level below the surface.The dimensions of the dome are oblong, approximately two miles by three miles in width of solid rock salt. The depth of the salt mass is unknown however most estimates of salt dome depth along the Gulf Coast are 10,000 to 30,000 feet. |
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| | Hockley's first office located above our rock salt mine in the 1930's. In the depths of the great depression the Hockley plant was primarily producing agricultural feed salt serving markets in Texas and surrounding states. |
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| | This photo of the new warehouse completed in the early 1930's highlights our tradition, lasting through today, of maintaining an inventory of our customers critically needed products. Note the bag weight requiring two workers to place on the stacks. Bag weights on average today are much less. |
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 | | Many things have changed in our industry. This ad, placed by United Salt in an agricultural trade magazine in the 1930's shows salt blocks being loaded on rail cars. Note, these are not compressed 50 Lb. blocks, these are chunks of rock salt, recently blasted out of the formation underground and sold as is. Things have really changed. |