Production of bituminous coal in New Zealand

By mining method, 1993–2023, kilotonnes

The following information applies to all values in the table. Fuel type: Coal, Measure: Supply, Activity: Production, Rank: Bituminous
Year	Mining method	Tonnes
1993	Underground	121,368
1994	Underground	162,585
1995	Underground	370,033
1996	Underground	475,252
1997	Underground	273,304
1998	Underground	360,142
1999	Underground	443,054
2000	Underground	421,224
2001	Underground	414,385
2002	Underground	320,000
2003	Underground	222,000
2004	Underground	255,302
2005	Underground	345,015
2006	Underground	500,779
2007	Underground	166,247
2008	Underground	480,662
2009	Underground	600,481
2010	Underground	797,189
2011	Underground	444,874
2012	Underground	115,081
2013	Underground	89,900
2014	Underground	120,754
2015	Underground	163,441
2016	Underground	191,972
2017	Underground	0
2018	Underground	0
2019	Underground	0
2020	Underground	0
2021	Underground	0
2022	Underground	0
2023	Underground	0
1993	Opencast	1,099,770
1994	Opencast	1,102,782
1995	Opencast	1,331,970
1996	Opencast	1,387,675
1997	Opencast	1,130,219
1998	Opencast	814,808
1999	Opencast	1,184,154
2000	Opencast	1,273,992
2001	Opencast	1,482,386
2002	Opencast	1,948,906
2003	Opencast	2,129,000
2004	Opencast	2,271,311
2005	Opencast	2,198,389
2006	Opencast	2,267,870
2007	Opencast	1,852,554
2008	Opencast	1,912,683
2009	Opencast	1,485,005.09
2010	Opencast	1,811,578.41
2011	Opencast	1,899,150
2012	Opencast	2,164,261.88
2013	Opencast	2,189,357.48
2014	Opencast	1,815,127.22
2015	Opencast	1,237,445
2016	Opencast	1,013,416
2017	Opencast	1,212,126
2018	Opencast	1,318,966
2019	Opencast	1,291,197
2020	Opencast	1,128,917
2021	Opencast	1,256,583.7
2022	Opencast	1,230,681.04
2023	Opencast	1,306,699.44

Definitions

Coal supply: production of coal plus imported coal, minus exported coal and stock change.
Energy transformation: the conversion of primary energy to more useful forms of energy. It includes activities such as electricity generation, oil refining, and other transformation (including coal used for steel manufacturing) as well as losses.
Consumer energy demand: includes all energy used by final consumers. It does not include energy transformation.

FIELDS
Information about coalfields in New Zealand can be found here: http://www.nzpam.govt.nz/cms/investors/our-resource-potential/minerals/coal/operating-coal-mines

RANK
Bituminous coal (black coal): a relatively soft coal containing a tarlike substance called bitumen. It is of higher quality than lignite coal but of poorer quality than anthracite.
Sub-bituminous coal: a type of coal whose properties range from those of lignite to those of bituminous coal and are used primarily as fuel for steam-electric power generation.
Lignite (brown coal): a soft brown combustible sedimentary rock formed from naturally compressed peat. It is considered the lowest rank of coal due to its relatively low heat content.

MINING METHOD
Opencast: Open-pit mining is a surface mining technique of extracting rock or minerals from the earth by their removal from an open pit or borrow.
Underground: Sub-surface mining consists of digging tunnels or shafts into the earth to reach buried ore deposits.