Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Ombilin Coal Mining Heritage of Sawahlunto' has mentioned 'Mining' in the following places:
Occurrence Sentence Text Source
Coal was discovered in the mid-19th century by Willem Hendrik de Greve, and mining was pioneered in the area in 1876.
Mining started at the open-pit mine in 1892 after the construction of a railway.
Prisoners/Kettingganger (Dutch for people in chains) from Java and Sumatra who were transported to the mining site with their legs, hands and necks in chained up, were the main laborers of the mine.
[3] Coal production in this mining area was able to fulfill 90 percent of the Dutch East Indiesxe2x80x99 energy needs.
In 1945xe2x80x931958, the mine was managed by the directorate of mining and in 1958xe2x80x931968, by the bureau of state mining companies.
The mining area continues to bring benefits to its constituents through reforestation of the former mining location and its conversion into a tourist destination.
[4] There is Ombilin Coal Mining Museum at Ombilin Coal Mine Complex about the history of the company and the tools that were used for mining.
The mining site has been transformed into a zoo, lake and horse-riding track.
Built to exploit the exceedingly rich Ombilin coal deposits, located in the inaccessible mountains of West Sumatra, the Ombilin Coal Mining Heritage of Sawahlunto is an extensive technological ensemble consisting of twelve components located in three functionally-related areas: Area A, consisting of open pit mines and labyrinthine underground mining tunnels together with on-site coal processing facilities, supported by a full-facility purpose-built mining town nearby at Sawahlunto; Area B, an ingeniously engineered rack mountain railway together with numerous rail bridges and tunnels, linking the mines to the coastal seaport, across 155 kilometres of rugged mountain terrain; and Area C, a dredged harbour and newly-constructed seaport at Emmahaven on Sumatra's Indian Ocean coast from where the coal was shipped throughout the Netherlands East Indies and to Europe.
Criterion (ii): Ombilin Coal Mining Heritage of Sawahlunto exhibits a significant interchange of mining technology between Europe and its colonies during the second half of the 19th century and early 20th century.
Its overall design and staged execution shows a systematic and prolonged transfer of engineering knowledge and mining practices intended to develop the mining industry in the Netherlands East Indies.
The components that comprise the company town and railway line continue to function; whereas the mining components are no longer in use.
The Sawahlunto mining sites and company town currently provide visitor and tourism experiences including seven local museums and a visitor centre.