My Great Grandparents and Grandparents Are from Johnstown PA and W

My Great grandparents, and grandparents are from Johnstown, Pa., and we are searching for any information on them at all. My Great Grandparents gave birth to My grandfather Charles Anthony Kohler, on 9-19-1881. My grandparents survived the great flood, and we are planning a trip there on ASug. l8, thru the 2lst, hopeing to find some information on them. Any help would be so much appreciated, as we have nothing to go on right now.