Investor Presentaiton

Stable Production Volumes & Throughput Core plants in sustainable plays Mmcf/d 1,600 Gross Annual Throughput 1,200 800 400 0 2015 2016 A 2017 A Other Extraction Harmattan take or pay 2018F FG&P: ~500 Mmcf/d* 2018F extraction: ~1 Bcf/d Blair Creek 2016 66 Mmcf/d 2017 57Mmcf/d 2018E-60-70 Mmcf/d Gordondale 2016 90 Mmcf/d 2017-94 Mmcf/d 2018E 100 - 110 Mmcf/d Harmattan 2016 109 Mmcf/d 2018 E ■■Harmattan raw gas processing Other FG&P** ■Blair Creek Extraction Volumes * 2017 101 Mmcf/d 2018E-95 105 Mmcf/d³ Townsend¹ 2017 154 Mmcf/d - 2018E 255 - 265 Mmcf/d Younger4 ■Gordondale * ■ Townsend * 40,000 30,000 20,000 10,000 0 2015 2016 ■C2 Produced AltaGas 2017 ■Non-commodity exposed C3+ 2018E2 Exposed C3+ 2016 290 Mmcf/d 2017 267 Mmcf/d 2018E-210 - 220 Mmcf/d5 Other FG&P 2016 90 Mmcf/d 2017 87 Mmcf/d 2018E 70-80 Mmcf/d6 1 Includes Townsend and Townsend 2A 2 Expectations as at August 1, 2018 3 Includes a turnaround in 2018 4 Volumes net to AltaGas 5 Reflects reduced ownership percentage for April onwards 6 Reflects sale of Acme and Shaunovan * All or large majority of volumes are take-or-pay commitments **2015 total volumes exclude 2015 average volumes for assets sold to Tidewater. Acme, Ante Creek and ECNG sold in 2014 See "forward-looking information" 35

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