The Blue Lake Pumping Station
Meticulously cared for, both inside and out, the old Blue Lake Pumping Station perches gracefully on a ledge 150 feet above the water level in the crater. The attractive cream dolomite building with pink dolomite quoins was built in 1884 and extended in 1909.

In 1922 the chimney of its steam plant was taken down when the latter was replaced by electrical power and finally, in 1973, alterations were made to the interior and a verandah added. The attractive finials on the roof are reproductions of the originals.

The reticulated water supply for Mount Gambier became a reality in 1883. It is said that sources other than the Blue Lake were at first suggested - the Valley Lake and even Lake Edward at Glencoe. The scheme chosen involved the building of an underground reservoir at Keegan Drive (still in use, though other storages have been erected), which received the Blue Lake water through pump jacks operating in an eight foot diameter shaft inside the dolomite building.

In 1922, in response to increasing demand, these jacks were replaced by electrically driven centrifugal pumps set in a building at the water's edge. Since 1971 the primary pumping units have been mounted on a steel floating platform which can allow for a 15 foot rise or fall in the lake level, and the secondary pump units are on a concrete slab at the edge of the lake. The new pumping arrangements were officially opened in 1975. The old Pumping Station still contains the control board and electrical equipment and also has a museum display of some picturesque old equipment, the piece de resistance being a Venturi flow meter about twice the size of a grandfather clock.
The original eight foot shaft now houses a lift which enables the men working the pumps to avoid the negotiation of 120 feet of steps, and a tunnel runs from the shaft to the edge of the lake. Incidentally, the pumps are now fully automatic.

As long as rain continues to fall on the aquifers of the county of Grey, as long as pollution can be kept within limits and provided always that the volcano remains asleep, residents of Mount Gambier should be able to count on the eight thousand million gallons of rather hard but good quality water in their natural reservoir. Blue Lake water also has the priceless element of mystery, for no one has yet advanced a truly adequate explanation to account for the miraculous change from grey to aquamarine to brilliant sapphire blue that occurs each year between November and December and delights us all through summer.

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