About: http://webisa.webdatacommons.org/44859996

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	You are right, maintenance is a big issue not only relating to natural drainage features, but also porous pavements, etc.
http://www.w3.org/ns/prov#wasQuotedFrom	planetizen.com