Century Aluminum Company - Company Announcement

Century, Big Rivers and Kenergy Reach Tentative Agreement on Framework for Market Priced Power for Hawesville Smelter

MONTEREY, CA--(Marketwired - April 29, 2013) - Century Aluminum of Kentucky, a
wholly owned subsidiary of Century Aluminum Company (NASDAQ: CENX), Kenergy
Corp. and Big Rivers Electric Corp. today announced that they have reached a
tentative agreement on the framework for providing market priced power to the
Hawesville smelter. Under the arrangement, the electric cooperatives would
purchase power on the open market and pass it through to Century at the market
price plus additional costs incurred by them. The arrangement is intended to
have no impact on the current rate proposal of Big Rivers or the related
flow-through rate proposal of Kenergy, each currently pending before the
Kentucky Public Service Commission. The framework is subject to the negotiation
of definitive agreements and approvals from various third parties, including
the boards of directors of all parties, the KPSC, the Rural Utilities Service
and others. The parties intend to move as expeditiously as possible to finalize
the agreement in advance of the expiration of the current power contract on
August 20, 2013. 

The Hawesville smelter, located in Hancock County, KY, has a rated capacity of
244,000 tonnes of primary aluminum and employs approximately 650 men and women. 

Century Aluminum Company, the parent of Century Aluminum of Kentucky, owns
primary aluminum capacity in the United States and Iceland. Century's corporate
offices are located in Monterey, California. More information can be found at
www.centuryaluminum.com. 

Big Rivers Electric Corporation is a customer (Member) -owned, not-for-profit,
wholesale electric generation and transmission cooperative headquartered in
Henderson, Kentucky that is owned by three distribution cooperative Members --
Jackson Purchase Energy Corporation, headquartered in Paducah; Kenergy Corp,
headquartered in Henderson; and Meade County Rural Electric Cooperative
Corporation, headquartered in Brandenburg. These Member cooperatives deliver
retail electric power and energy to over 113,000 residential, commercial, and
industrial customers in portions of 22 western Kentucky counties. 

Kenergy Corp. is a nonprofit electric cooperative that serves 55,282 members in
14 counties in western Kentucky, including Breckinridge, Caldwell, Crittenden,
Daviess, Hancock, Henderson, Hopkins, Livingston, Lyon, McLean, Muhlenberg,
Ohio, Union and Webster. The corporate headquarters is located in Henderson,
Ky. 

Cautionary Statement

This press release contains "forward-looking statements" within the meaning of
the Private Securities Litigation Reform Act of 1995. Forward-looking
statements are statements about future, not past, events and involve certain
important risks and uncertainties, any of which could cause our actual results
to differ materially from those expressed in our forward-looking statements.
Such risks and uncertainties may include, without limitation, whether or not
the parties are able to agree to definitive documentation reflecting the
tentative agreement and obtain all necessary approvals and consents, whether or
not certain proposed equipment upgrades are agreed to and completed and whether
or not the market pass through arrangement can be completed prior to the
expiration of the current power contract. Forward-looking statements in this
press release include statements regarding the completion of an agreement to
provide, and the ultimate provision of, market priced power to the Hawesville
smelter and whether or not such an arrangement would have any impact on rate
proposals currently pending before the Kentucky Public Service Commission. More
information about these risks, uncertainties and assumptions can be found in
the risk factors and forward-looking statements cautionary language contained
in our Annual Report on Form 10-K and in other filings made with the Securities
and Exchange Commission. We do not undertake, and specifically disclaim, any
obligation to revise any forward-looking statements to reflect the occurrence
of future events or circumstances. 

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.


Century Aluminum Contacts:

Clair Nichols (media)
502-649-8956

Shelly Harrison (investors)
831-642-9357