到1982年，佛罗里达州坦帕大都会地区的快速增长，使对水的需求超过了该市唯一的水处理厂的容量。希尔斯伯勒河工厂被指定为AWWA美国地标，自1925年建成以来，已扩大了三倍。最近一次扩建于去年完成，在不修建新沉淀池的情况下增加了36 mgd（13.6万m3/d）的容量。水力瓶颈的消除和流态的改善、快速混合设施和污泥去除系统在不进行大规模新建的情况下提高了处理能力，节省了新沉淀池估计成本的一半左右。包括6个参考文献、表格、图表。

By 1982, rapid growth in the metropolitan area of Tampa, Florida, had increased the demand for water beyond the capacity of the city's only water treatment plant. Designated an AWWA American Landmark, the Hillsborough River plant had been enlarged three times previously since its construction in 1925. The latest expansion, which was completed last year, added 36 mgd (136,000 m3/d) of capacity without constructing new settling basins. Removal of hydraulic bottlenecks and improvement of flow patterns, rapid-mixing facilities, and the sludge removal system increased capacity without major new construction, saving about half the estimated cost of new settling basins. Includes 6 references, table, figures.