Assertion: weir's construction | /r/HasProperty | 21 b
Facets:
Source sentences:
text: The construction of the fixed-in-place impediment 21 b with excavated materials 21 c to form the tailrace pool 21 a increases the surface level 25 of the spent water retained in the tailrace pool 21 a to keep the outlets of the tailrace 38 submerged.