After World War II more capital became available to improve the area's economy. After 1955, large public projects were undertaken, such as the building of new schools and hospitals, tarring of the city's roads (a project begun in 1928 with Kaiser Street), and the building of dams and pipelines to stabilise the water supply. The city introduced the world's first potable re-use plant in 1958, treating recycled sewage and sending it directly into the town's water supply. On 1 October 1966 the then Administrator of South West Africa granted Windhoek the coat of arms, which was registered on 2 October 1970 with the South African Bureau of Heraldry. Initially a stylized aloe was the principal emblem, but this was amended to a natural aloe (''Aloe littoralis'') on 15 September 1972. The Coat of Arms is described as "A Windhoek aloe with a raceme of three flowers on an island. Crest: A mural crown Or. Motto: SUUM CUIQUE (''To each his own'')".