Century Aluminum Company - Company Announcement (is)

Century Issues WARN Notice at Mt. Holly, SC Smelter

Plant to Be Curtailed Unless New Power Arrangement Reached

CHICAGO, IL--(Marketwired - October 22, 2015) - Century Aluminum of South
Carolina, a wholly-owned subsidiary of Century Aluminum Company (NASDAQ: CENX),
today issued a notice to employees at its Mt. Holly, South Carolina aluminum
smelter of its intent to curtail plant operations if the smelter is unable to
secure a competitively priced power arrangement to deliver energy to the plant.
The announcement was made pursuant to the federal Working Adjustment and
Retraining Notification Act (WARN). 

If a competitively priced power arrangement cannot be secured, Century Aluminum
of South Carolina will curtail 100% of smelter operations by no later than
December 31, 2015, when its current power contract with the South Carolina
Public Service Authority, also known as Santee Cooper, to produce and deliver
the required power expires. Santee Cooper's current rate to Mt. Holly is the
highest rate paid by any U. S. smelter. "Mt. Holly is the newest, most efficient and, except for its power costs, the
lowest cost aluminum smelter in the U.S., with a dedicated and highly skilled
workforce and a world class customer base," commented Michael Bless, President
and Chief Executive Officer. "We have reached agreement with a third-party
provider to produce the required power at market rates. Unfortunately, we have
been unable to reach agreement with Santee Cooper to deliver such power to Mt.
Holly despite Mt. Holly's offer to pay Santee the full transmission tariff rate
-- the same rate Santee charges other customers seeking similar service. We
remain resolved to finding a solution that will support the plant's continuing
operations and preserve the plant's over 2000 direct and indirect jobs and over
$945 million in annual economic impact to the region. "Time is running short and, without a prompt agreement with Santee to deliver
the energy, the Mt. Holly plant will close," Mr. Bless continued. "During these
difficult times, our people remain dedicated to operating the plant safely and
efficiently."

About Century Aluminum

Century Aluminum Company owns primary aluminum capacity in the United States
and Iceland. Century's corporate offices are located in Chicago, IL. 

Visit www.centuryaluminum.com for more information.

Certified Advisors for the First North market of the OMX Nordic Exchange
Iceland hf. for Global Depositary Receipts in Iceland: 

Atli B. Gudmundsson, Senior Manager -- Corporate Finance, Landsbankinn hf.
Steingrimur Helgason, Director -- Corporate Finance, Landsbankinn hf.