Alterra Power and EDC Finalize Joint Venture for Geothermal Assets in Chile and Peru

 Alterra Power and EDC Finalize Joint Venture for Geothermal Assets in Chile
                                   and Peru

PR Newswire

VANCOUVER, June 20, 2013

TSX : AXY

VANCOUVER, June 20, 2013 /PRNewswire/ - Alterra Power Corp. (TSX: AXY) is
pleased to announce that Energy Development Corporation (EDC) has issued
notice to proceed for the development of Alterra's Mariposa geothermal project
in Chile and the Crucero, Loriscota, and Tutupaca Norte concessions in Peru.
Definitive shareholders agreements have been executed by the parties, and due
diligence has been completed. The JV terms call for EDC to earn a 70% interest
by funding 100% of the next $58.3 million in project expenditures at Mariposa,
and $8.0 million in project expenditures at the Peruvian concessions. Under
the agreed work plan at Mariposa, the JV will further develop infrastructure
over the next 18 months, including new roads and drill pads, and
production-scale drilling will commence in late 2014. Next activities at the
Peruvian concessions will include advanced exploration activities designed to
identify the best locations for power plant development and construction. John
Carson, Alterra's CEO said "We're pleased to be partnering with EDC, who
brings significant new capital and expertise to these assets. We expect the
Mariposa project to be the flagship geothermal power production area in Chile,
which continues to have a strong need for power."

About Alterra's Mariposa and Peruvian Geothermal Assets

The Mariposa geothermal power project is located approximately 300  kilometers 
south of Santiago, Chile. It is comprised of the Laguna del Maule and  Pellado 
concessions,  which  total  104,000   hectares  and  completely  encompass   a 
geothermal system that has an inferred estimate of 320 megawatts. Alterra  has 
conducted extensive exploration and infrastructure work at Mariposa, including
three slim-hole  wells  and  a  26-kilometer access  road.  Alterra  also  has 
early-stage geothermal projects in the southern volcanic belt of Peru. Initial
indications and Alterra's  exploration activities to  date have supported  the 
presence of large geothermal resources.

About Energy Development Corporation (EDC)

EDC is a  Philippines-based global  leader in the  geothermal energy  industry 
that has been developing and operating power plants since 1977. The  company's 
operating portfolio of  11 geothermal  power plants and  two hydro  facilities 
totals 1,262 megawatts of capacity  and produced over 3,600 gigawatt-hours  in 
the first half of 2012. EDC has been actively expanding its project  portfolio 
to Indonesia, Peru and Chile.

About Alterra Power Corp.

Alterra Power Corp. is a leading global renewable energy company. Alterra
operates six power plants totaling 566 MW of capacity, including two
geothermal facilities in Iceland, a geothermal plant in Nevada, British
Columbia's largest run-of-river hydro facility and the province's largest wind
farm. The company's 297 MW share of production capacity generates
approximately 1,400 GWh of clean power annually. Alterra also has an extensive
portfolio of exploration and development projects, a skilled international
team of developers, explorers, builders and operators to support its growth
plans.

The company trades on the Toronto Stock Exchange under the symbol AXY and OTC
in the United States as MGMXF.

Cautionary Note regarding Forward-Looking Statements and Information
This news release contains certain "forward-looking information" within the
meaning of Canadian securities laws, which may include, but is not limited to,
statements with respect to future events or future performance, the
fulfillment of all conditions precedent to the obligation of the parties under
the agreements, required consents and third party approvals. This news release
also contains statements with respect to our plans to expand our operations,
management's expectations regarding our growth, business prospects and
opportunities and energy generation capacities. Such forward-looking
information reflects management's current beliefs and is based on information
currently available to management.

SOURCE Alterra Power Corp.

Contact:

Peter Lekich, Corporate Communications
Alterra Power Corp.
Phone: 604.235.6719
Email:info@alterrapower.ca