Assertion: zoned levee | /r/Desires | seepage control
Facets:
value: to prevent piping
type: PURPOSE
value: to prevent excessive uplift pressures
type: PURPOSE
Source sentences:
text: Zoned levees on permeable soils may require seepage control to prevent excessive uplift pressures and piping through the foundation by using horizontal drains, upstream impervious blankets, downstream seepage berms, toe drains, relief wells and cut-offs.