All of the photographs in this collection were taken by Patrick Joseph (P.J.) Tyrrell, who was born in Ireland on April 5, 1878. He attended the University of Dublin where he studied electrical engineering. Tyrell moved to Pittsburgh in 1900 and began his career with Duquesne Light in 1904 with the opening of the Brunot Island Power Station. He worked for Duquesne Light Company for 39 years. Living most of his Pittsburgh-area life in McKee’s Rocks, Tyrrell died on November 3, 1943.