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Design Methodology in early 1920s
The example is from • Prior to 1928, the example
Folwell’s Water Supply
rd
Engineering, 3 Ed designs published in
(1926) textbooks summed the
gravity forces as a line-of-
thrust without reservoir
pressure, and another line-
of-thrust with full reservoir
pressure.
• Until 1945, most engineers
assumed that concrete was
sufficiently impervious to
resist saturation, and that
dams founded on crystalline
rock, such as granite or
gneiss, would not be
subject to hydraulic uplift.
