 Hillman even engaged in a significant capital re-investment at Jerome, rebuilding a brick new community center after the initial structure was destroyed in a spectacular, wind-driven fire on April 2, 1922.However, demand for coal nationwide dropped precipitously and continually in the several years after World War I.In a response, Hillman closed its mines at Ella and Patterson, Allegheny County, and at Naomi, Fayette County, but maintained production at Boswell and Jerome.