Commenced in August 1980 and completed in June 1983, the concrete-faced
rock-filled Glennies Creek Dam is a minor dam on Glennies Creek, a tributary of the
Hunter River, located approximately north of Singleton and upstream of the
confluence of Glennies Creek with the Hunter River. The dam was built by Citra Constructions Limited on behalf of the NSW Department of Land and Water Conservation and the NSW Department of Water Resources to supply water for the town of Singleton, as well as irrigation, flood mitigation, and for
coal mining. The dam wall is high and the arch crest is long. The maximum water depth is and when full, the resultant reservoir has capacity of at . The surface area of Lake Saint Clair is and the
catchment area is . The
uncontrolled rock-cut spillway is capable of discharging . The Glennies Creek and the Glennies Creek Dam are both named after James Glennie, a former naval captain who was granted creek frontage land near the Hunter River junction in 1824. ==Recreation==