1980 Press Photo Pleasant Prairie Power Plant General Supt., Richard Grigg

General Superintendent Richard Grigg outlined the step by step procedure being followed: First the water pumps and five miles of pipeline to Lake Michigan were check out. One pipe is 30 inches in diameter; the other, 18 inches. They are linked to a closed loop circulation system, the company's first, which confines needs to so-called makeup water.

Photo measures 10 x 7.5 inches. Photo is dated 05-08-1980.

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