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- 15:21, 13 June 2022 Camrenbt talk contribs created page Typical Filter and Drain Configurations (Created page with "Properly sized filters and drains that prevent unprotected exits are crucial to successful embankment repairs and construction. ==Sand Filter== Provides a barrier between the core of the dam and the downstream shell. The sand filter captures flow traveling through the embankment and prevents the movement of soil particles. ASTM C33 concrete sand is an excellent filter for most embankment dams. ==Drain Rock== Accommodates any concentrated seepage that is greater than th...")