The water passed over the dam about a foot above its top, beginning at about half-past 2. Whatever happened in the way of a cloud-burst took place in the night. There had been little rain up to dark. When the workmen woke in the morning the lake was full, and rising at the rate of a foot an hour. It kept on rising until 2 P. M., when it began breaking over the dam and undermining it. Men were sent three or four times during the day to warn people below of their danger. When the final break came at 3 o'clock, there was a sound like tremendous and continued peals of thunder. Trees, rocks and earth shot up into mid-air in great columns and then started down the ravine. A farmer who escaped said that the water did not come down like a wave, but jumped on his house and beat it to fragments in an instant. He was safe on the hillside, but his wife and two children were killed. Herbert Webber, who was employed by the Sportsmen's Club at the lake, tells that for three days previous to the final outburst, the water of the lake forced itself out through the interstices of the masonry, so that the front of the dam resembled a large watering pot. The force of the water was so great that one of these jets squirted full thirty feet horizontally from the stone wall. All this time, too, the feeders of the lake, particularly three of them, more nearly resembled torrents than mountain streams, and were supplying the dammed up body of water with quite 3,000,000 gallons of water hourly. At 11 o'clock that Friday morning, Webber says he was attending to a camp about a mile back from the dam, when he noticed that the surface of the lake seemed to be lowering. He doubted his eyes, and made a mark on the shore, and then found that his suspicions were undoubtedly well founded. He ran across the country to the dam, and there saw, he declares, the water of the lake welling out from beneath the foundation stones of the dam. Absolutely helpless, he was compelled to stand there and watch the gradual development of what was to be the most disastrous flood of this continent. According to his reckoning it was 2.45 when the stones in the centre of the dam began to sink because of the undermining, and within eight minutes a gap of twenty feet was made in the lower half of the wall face, through which the water poured as though forced by machinery of stupendous power. By 3 o'clock the toppling masonry, which before had partaken somewhat of the form of an arch, fell in, and then the remainder of the wall opened outward like twin gates, and the great storage lake was foaming and thundering down the valley of the Conemaugh.