The route west of the mountain is down the valley of the Conemaugh, in a district underlaid with coal, and having at every village evidence of this industry. The Conemaugh is "the other stream" of the Indians, and winding down its tortuous valley, with coal and iron all about, the railway comes to the settlement of Conemaugh, which spreads into the larger town of Johnstown, the seat of the great Cambria Steel Works. The Conemaugh Valley is a deep canyon, and Conemaugh village was the western terminus of the mountain portage, where the canal began. A little flat space about a mile beyond, at the junction of Stony Creek, was in early times an Indian village, then known from its sachem as "Kickenapawling's Old Town." When the white men ventured over the mountain, there came among them a hardy German pioneer named Joseph Jahns, who built a log cabin on the flat in 1791, and from him the cluster of little houses that grew afterwards became known as Jahnstown. Then came the Welsh miners and iron-workers, and they set up charcoal furnaces, and soon changed the name to Johnstown. From this humble beginning grew the largest iron and steel establishment in Pennsylvania. Its ores, coal and limestone were originally all dug out of the neighboring ridges, though now it uses Lake Superior ores. The Conemaugh Valley is here enclosed by high hills, and in the centre of the town the railroad is carried across the river on a solid stone bridge with low arches. This region, on May 31, 1889, was the scene of one of the most appalling disasters of modern times. A deluge of rain for the greater part of two days had fallen upon the Alleghenies, and made great freshets in both the Juniata and the Conemaugh. On the South Fork of the Conemaugh, fifteen miles above Johnstown, is Conemaugh Lake, a reservoir there formed by damming the stream, so that it covered a surface of five hundred acres--the dam, a thousand feet long, being in places one hundred feet high. This had been made as a fishing-ground by a club of Pittsburg anglers. The excessive rains filled the lake, and the weakened dam burst, its twenty millions of tons of waters rushing down the already swollen Conemaugh in a mass a half-mile wide stretching across the valley and forty to fifty feet high, carrying everything before it. The lake level was about three hundred feet higher than Johnstown, and every village, tree, house, and the whole railway, with much of the soil and rocks, were carried before the resistless flood to Johnstown, where the mass was stopped by and piled up behind the stone railway bridge, and there caught fire, the resistless flood, to get out, sweeping away nearly the whole town in the valley bottom. This vast calamity destroyed from three to five thousand lives, for no accurate estimate could be ever made, and ten millions of property. It took the flood about seven minutes of actual time to pass over the fifteen miles between the lake and Johnstown,