AltaGas Ltd. Officially Opens Forrest Kerr, Volcano Creek and McLymont Creek Hydroelectic Facilities in Northwest B.C.

| Source: AltaGas Ltd. AltaGas Ltd.

CALGARY, ALBERTA--(Marketwired - June 2, 2015) -

Editors Note: There are three photos associated with this Press Release.

AltaGas Ltd. ("AltaGas") (TSX:ALA) today held the official naming and grand opening ceremony for its Forrest Kerr, Volcano Creek and McLymont Creek run-of-river hydroelectric facilities at the site of the facilities in northwest British Columbia.

Located in Tahltan First Nation territory, the 195-megawatt Forrest Kerr Hydroelectric Facility achieved commercial operation date (COD) in October 2014. The 16-megawatt Volcano Creek Hydroelectric Facility achieved COD in December 2014. Both facilities were completed on time and on budget and are delivering clean power to BC Hydro's power grid through their 287-kV Northwest Transmission Line. The 66-megawatt McLymont Creek Hydroelectric Facility is nearing completion and will be brought online later this year. The Tahltan First Nation has played a key role in the success of the projects and will work closely with AltaGas to provide clean energy to British Columbia for decades to come.

Members from the Tahltan First Nation, Chad Day, President Tahltan Central Council and government officials Bill Bennett, Minister of Energy and Mines, John Rustad, Minister of Aboriginal Relations and Reconciliation, Les MacLaren, Assistant Deputy Minister, Electricity and Alternative Energy Division, Ministry of Energy and Mines joined David Cornhill, Chairman and Chief Executive Officer, members of AltaGas' Board of Directors and AltaGas staff to officially open the facilities.

Video and images from today's event are available as follows:

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http://www.marketwire.com/library/20150602-1010607b_800.jpg

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B-roll footage of the announcement will be available via satellite on Tuesday, June 2nd at 4:00 - 4:15 p.m. Pacific

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Contact Information:

Media
(403) 691-7197
media.relations@altagas.ca

AltaGas' 195-MW Forrest Kerr Hydroelectric Facility (shown in this recent photo), which started delivering clean energy to BC Hydro's Northwest Transmission Line in 2014, was officially opened, Tuesday, June 2, 2015, at a grand opening ceremony in Tahltan Territory that included officials from AltaGas, government and the Tahltan First Nation. MARKETWIRED PHOTO/AltaGas Ltd. AltaGas' 195-MW Forrest Kerr Hydroelectric Facility (shown in this recent photo), which started delivering clean energy to BC Hydro's Northwest Transmission Line in 2014, was officially opened, Tuesday, June 2, 2015, at a grand opening ceremony in Tahltan Territory that included officials from AltaGas, government and the Tahltan First Nation. MARKETWIRED PHOTO/AltaGas Ltd. Minister John Rustad (from left), David Cornhill (Chairman and CEO AltaGas), Chad Day (President Tahltan Central Council) and Minister Bill Bennett celebrate the grand opening of the AltaGas Northwest Hydroelectric Facilities, Tuesday, June 2, 2015, in Tahltan Territory, at the Forrest Kerr Hydroelectric Facility intake. MARKETWIRED PHOTO/AltaGas Ltd.