At the southern end of the Lake Pedder, the Scotts Peak Dam impounds the upper reaches of the Huon River.

Built on a foundation of rock and soil, the Serpentine Dam wall was constructed with 127 thousand cubic metres (4.5×10^6 cu ft) of rockfill and faced with concrete.

At 100% capacity the dam wall holds back 2,937,930 megalitres (103,752×10^6 cu ft) of water.

The dam wall has a controlled spillway capable of discharging 242 cubic metres per second (8,500 cu ft/s).

One sub-population existed along the Serpentine River and is now inundated as a direct cause of the creation of this dam.