直接过滤装置的建造和运行的估计成本通常与实际装置建造成本存在显著差异。然而，当考虑到不同的电厂设施设计标准或施工阶段时，可以在估计和实际运行及施工成本之间达成合理的一致。此外，除了密歇根州两个港口的工厂的实际成本外，还审查了卡尔普/韦斯纳/卡尔普对施工、运营和维护成本曲线的研究；克拉卡马斯；明尼苏达州德卢斯；华盛顿州贝灵汉；马萨诸塞州斯普林菲尔德；加利福尼亚州奥克兰； 以及内华达州拉斯维加斯。包括16个参考文献、表格和图表。

The estimated costs of construction and operation of direct filtration plants often differ significantly from actual plant construction costs. However, when different plant facilities design criteria, or construction phasing are taken in account, a reasonable agreement between estimated and actual operation and construction costs can be achieved. Also, the Culp/ Wesner/Culp study of cost curves for construction and operation and maintenance are reviewed in addition to actual costs from plants in Two Harbors, MI; Clackamas, OR; Duluth, MN; Bellingham, WA; Springfield, MA; Oakland, CA; and Las Vegas, NV. Includes 16 references, tables, figures.