CALGARY, ALBERTA--(Marketwire - April 28, 2010) - AltaGas Income Trust (AltaGas or the Trust) (TSX:ALA.UN) today announced that it has entered into an agreement to acquire the 28 Mmcf/d Groundbirch sour gas plant currently under construction in northeast British Columbia from Monterey Exploration Ltd. (Monterey) (TSX: MXL), subject to certain approvals and conditions precedent. Under the agreement, AltaGas will commit approximately $28 million to construct the gas plant and related infrastructure in return for 100 percent ownership of the gas plant and a dedicated take-or-pay processing obligation. The facilities will process production from a Montney gas development, and are expected to be fully commissioned in fourth quarter 2010.

"The addition of the Groundbirch gas plant will provide AltaGas with additional presence in one of the largest, low cost resource plays in the Western Canada Sedimentary Basin," said David Cornhill, Chairman and CEO of AltaGas. "We are extremely pleased to be working with Monterey, and are excited about the opportunity to build on this relationship and support Monterey's exciting growth."

AltaGas Income Trust is one of Canada's largest and fastest growing energy infrastructure organizations. The Trust creates value by acquiring, growing and optimizing gas and power infrastructure, including a focus on renewable energy sources.

AltaGas Income Trust's units are listed on the Toronto Stock Exchange under the symbol ALA.UN. The Trust is included in the S&P/TSX Composite Index, the S&P/TSX Income Trust Index and the S&P/TSX Capped Energy Trust Index.

This news release contains forward-looking statements. When used in this news release, the words "may", "would", "could", "will", "intend", "plan", "anticipate", "believe", "seek", "propose", "estimate", "expect", and similar expressions, as they relate to the Trust or an affiliate of the Trust, are intended to identify forward-looking statements. In particular, this news release contains forward-looking statements with respect to, among other things, business objectives, expected growth, results of operations, performance, business projects and opportunities and financial results. These statements involve known and unknown risks, uncertainties and other factors that may cause actual results or events to differ materially from those anticipated in such forward-looking statements. Such statements reflect the Trust's current views with respect to future events based on certain material factors and assumptions and are subject to certain risks and uncertainties, including without limitation, changes in market, competition, governmental or regulatory developments, general economic conditions and other factors set out in the Trust's public disclosure documents. Many factors could cause the Trust's actual results, performance or achievements to vary from those described in this news release, including without limitation those listed above. These factors should not be construed as exhaustive. Should one or more of these risks or uncertainties materialize, or should assumptions underlying forward-looking statements prove incorrect, actual results may vary materially from those described in this news release as intended, planned, anticipated, believed, sought, proposed, estimated or expected, and such forward-looking statements included in, or incorporated by reference in this news release, should not be unduly relied upon. Such statements speak only as of the date of this news release. The Trust does not intend, and does not assume any obligation, to update these forward-looking statements. The forward-looking statements contained in this news release are expressly qualified by this cautionary statement.