During the maintenance of an earthen dam, the apparent seepage through the foundation of the dam is best taken care of by providing ______________________
A. chimney drain
B. rock toe
C. drain trench along the downstream toe
D. upstream impervious cut-off
Answer:C
During the maintenance of an earthen dam, the apparent seepage through the foundation of the dam is best taken care of by providing ______________________
A. chimney drain B. rock toe C. drain trench along the downstream toe D. upstream impervious cut-off