The dam and reservoir survive today little changed from their original appearance in 1908. The dam stands in height and extends in length. The dam is founded on granite bedrock and consists of twelve arches, which are supported by intervening buttresses on the downstream side. The height was set at because of a tract of land "not" owned by Hume-Bennet along the reservoir's edge that would have been inundated by water if the dam had been built any higher. The water level was maintained at a level slightly lower than it typically is today, through the use of spillway openings in the dam structure, which have since been filled.