The fertile fields were torn up and covered with masses of stone and gravel, and the flood left marks of its fury far up on the hill sides.

At the commencement of the rain which caused this flood, the ground was covered with snow to the depth of eighteen inches : the weather became warm and the powerful rain storm continued incessantly for forty-eight hours. Notwithstanding the immense volume discharged at the overfall of the dam, the water was rising, during the night previous to this disaster, at the rate of fourteen inches per hour over the

Reservoir, covering an area of four hundred acres. It occurred on the 8th of January, 1841. In repairing the breach was decided to build an extenit

sion of solid hydraulic masonry in the place of the portion of embankment which was carried away. The gate house and wing wall, which is seen on the ridge of the dam, shows where the masonry of the original structure connected with the embankment which extended across the river. The whole length of the overfall is 251 feet.

Access to the house over the culvert, is gained by a foot bridge which is seen in the picture. The masonry of the original structure has a rock foundation, and the extension of the overfall which is seen on the left of the house extending across to the embankment has an artificial foundation of concrete. The masonry of the dam is about 8 feet thick at the top and 65 feet at the base ; it is built in a vertical form on the upstream side, with occasional offsets, and the lower face