Assertion: revetment | /r/HasProperty | maintained
Facets:
Source sentences:
text: Revetments may not prevent on going shoreline recession unless they are maintained, and, if necessary, extended.
text: A revetment can be used for many years to effectively protect upland property if there is regular inspection and maintenance (such as repositioning rock into the revetment if it has shifted seaward, or adding small amounts of rocks if the revetment is settling slowly).