The largest great pond in USA named Great Pond is located in Kennebec County and is part of the Kennebec River watershed.

Salmon Lake flows into the east side of Great Pond via a short channel near the village of North Belgrade.

Other tributaries of Great Pond include Robbins Mill Stream, Rome Trout Brook, and Austin Bog.

The town of Rome is located at the north end of Great Pond.

The dam was built for power generation and is 14 feet (4.3 m) high.