Water view of Pennwalt Corp. shortly after Christmas, 1969. By 1969, Pennwalt (formerly known as Pennsalt or Pennsylvania Salt Manufacturing Co. of Washington) had been operating in Tacoma for 40 years. The company was located on 40-acres of land in Tacoma's Tideflats along the Hylebos Waterway. A leader in chemical production, it would merge with Wallace & Tiernan to form Pennwalt Corp. in 1969. More changes and mergers would occur and by 2004, the company would be known as Arkema, Inc. Photograph ordered by Pennwalt Corp.

Chemical industry--Tacoma--1960-1970; Pennsylvania Salt Manufacturing Co. of Washington (Tacoma); Pennwalt Corp. (Tacoma); Hylebos Waterway (Tacoma);

Exterior view of Pennwalt Corp. Formerly known as Pennsalt, the chemical producing company was located on 40 acres of land adjacent to the Hylebos Waterway. This view on December 26, 1969, shows one of the large piles of salt used by Pennwalt in daily operations. Doing business in Tacoma since 1929, Pennwalt had originally specialized in caustic soda and liquid chlorine for sale to the Pacific Northwest's pulp and paper industry before diversifying. Photograph ordered by Pennwalt Corp.

Chemical industry--Tacoma--1960-1970; Pennsylvania Salt Manufacturing Co. of Washington (Tacoma); Pennwalt Corp. (Tacoma);

Pennwalt plant. Located on 40 acres in the industrial Tacoma tideflats, the company was first known as the Pennsylvania Salt Manufacturing Co. of Washington or Pennsalt. Pennwalt was an inorganic chemical manufacturer of chlorine gas, caustic soda, liquid chlorine and hydrogen gas. Doing business in Tacoma since 1929, its caustic soda and liquid chlorine were in demand by the Northwest's pulp and paper industry. Photograph ordered by Pennwalt Corp.

Chemical industry--Tacoma--1970-1980; Pennsylvania Salt Manufacturing Co. of Washington (Tacoma); Pennwalt Corp. (Tacoma);

Pennwalt plant. This is another view in early 1976 of the sprawling Pennwalt Corporation plant located in Tacoma's tideflats along the Hylebos Waterway. The company was formerly known as the Pennsylvania Salt Manufacturing Co. of Washington or Pennsalt. It had been producing chemicals including caustic soda and liquid chlorine in Tacoma since 1929. Photograph ordered by Pennwalt Corporation.

Chemical industry--Tacoma--1970-1980; Pennsylvania Salt Manufacturing Co. of Washington (Tacoma); Pennsalt (Tacoma); Pennwalt Corp. (Tacoma);