The Salt Lake community is built in the larger and easternmost of three overlapping, low profile, tuff cones or volcanic craters: Makalapa, Āliamanu and Āliapa‘akai. A lake, at one time 1.5 km across (20 ha) but very shallow, formed in the bowl of Āliapa‘akai fed by freshwater springs or possibly seawater seepages (Alexander, 1926 in Maciolek, 1982). Because the lake had no outlet, water loss was largely by evaporation, concentrating salts. Up until 1910, the lake was regularly so salty that salt deposits formed around the shore. In that year, an artesian well was dug to bring the water level higher (and salt content lower) for use as a mullet pond; a tunnel, dug through the southeast rim of the crater, controlled water level and provided an outlet (Macdonald, Abbott, and Peterson. 1983). This act and later construction of a larger drainage outlet, eventually removed the salt from Salt Lake.