About: http://webisa.webdatacommons.org/449683079

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	Prior to the use of water for ballast, cheap and heavy materials such as rocks, sand, or soil were used.
http://www.w3.org/ns/prov#wasQuotedFrom	alaska.gov