Copies are available from the Association of State Dam Safety Officials (ASDSO) at a cost of $5.

A pamphlet describing the early signs of internal erosion and how to deal with it has been compiled by a team of experts, including the late geotechnical engineer Ronald Hirschfield.

Responsibilities of Dam Ownership: Internal Erosion of Earth Dams, also available from ASDSO, focuses on piping problems in earth dams. Piping is the internal erosion of soil particles from within a dam by water that seeps through the dam.

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