Alcoa 2012 Annual Report Download - page 17

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Alcoa Bauxite Interests, Share of Reserves and Annual Production1
Country Project
Owners’
Mining
Rights (%
Entitlement)
Expiration
Date of
Mining
Rights
Probable
Reserves
(million
bdmt)
Proven
Reserves
(million
bdmt)
Available
Alumina
Content
(%)
AvAl2O3
Reactive
Silica
Content
(%)
RxSiO2
2012
Annual
Production
(million
bdmt)
Australia Darling Range
Mines ML1SA
Alcoa of Australia
Limited (AofA)2
(100%) 2045 34.7 109.0 32.9 0.94 31.8
Brazil Poços de Caldas Alcoa Alumínio S.A.
(Alumínio)3(100%) 202040.5 1.1 39.5 4.3 0.8
Juruti4,5
RN102, RN103,
RN104
Alcoa World Alumina
Brasil Ltda. (AWA
Brasil)2(100%) 2100425.8 13.4 47.4 3.4 3.8
Jamaica Harmon’s
Valley
South
Manchester
North
Manchester
Alcoa Minerals of
Jamaica, L.L.C.2(55%)
Clarendon Alumina
Production Ltd.6(45%)
2031 2.6 0.9 42.1 1.9 1.8
Suriname Coermotibo Suriname Aluminum
Company, L.L.C.
(Suralco)2(55%)
N.V. Alcoa Minerals of
Suriname (AMS)7
(45%) 20338- 2.6 39.1 4.9 1.4
Onverdacht Suralco (55%)
AMS7(45%) 203383.1 0.7 51.8 4.5 1.6
Equity interests:
Brazil Trombetas Mineração Rio do
Norte S.A. (MRN)9
(100%) 204644.0 9.5 50.7 4.2 2.8
Guinea Boké Compagnie des
Bauxites de Guinée
(CBG)10 (100%) 203811 29.0 29.9
TAl2O312
50.2
TSiO212
1.7 3.2
Kingdom of
Saudi
Arabia
Al Ba’itha Ma’aden Bauxite &
Alumina Company
(100%)13
2037 33.9 21.3 TAA14
47.2
TSiO214
9.8
Production
to begin
2014
1This table shows only the AWAC and/or Alcoa share (proportion) of reserve and annual production tonnage.
2This entity is part of the AWAC group of companies and is owned 60% by Alcoa and 40% by Alumina Limited.
3Alumínio is owned 100% by Alcoa.
4Brazilian mineral legislation does not establish the duration of mining concessions. The concession remains in force
until the exhaustion of the deposit. The Company estimates that (i) the concessions at Poços de Caldas will last at least
until 2020, (ii) the concessions at Trombetas will last until 2046 and (iii) the concessions at Juruti will last until 2100.
Depending, however, on actual and future needs, the rate at which the deposits are exploited and government approval is
obtained, the concessions may be extended to (or expire at) a later (or an earlier) date.
5In September 2009, development of a new bauxite mine was completed in Juruti, state of Pará in northern Brazil. The
mine is fully operational and produced 3.8 million bdmt in 2012.
6Clarendon Alumina Production Ltd. is wholly-owned by the Government of Jamaica.
6