| Business | Phone |
| Alberta Products Pipeline 5000 Macall Way Ne, Calgary T2E 7J5 | (403) 250-9060 |
| Arctigas Resources Corp 540 5 Ave Sw #1230, Calgary T2P 0M2 | (403) 920-0333 |
| Atco Pipelines 909 11 Ave Sw #1200, Calgary T2R 1L7 | (403) 245-7060 |
| Group Two Pipeline Consultants 119 Sunlake Close Se, Calgary T2X 3H2 | (403) 256-3404 |
| Kore Consulting Ltd 8 Vardell Pl Nw, Calgary T3A 0B8 | (403) 288-8835 |
| Niagara Gas Transmission Ltd 425 1 St Sw #3000, Calgary T2P 3L8 | (403) 231-3900 |
| Peace Pipe Line Ltd 707 8 Ave Sw #2700, Calgary T2P 1H5 | (403) 231-7500 |
| Phantom Inspection Inc 5925 12 St Se #205, Calgary T2H 2M3 | (403) 201-3234 |
| Banyan Engineering Ltd 1100 8 Ave Sw #201, Calgary T2P 3T8 | (403) 299-4700 |
| Baseline Technologies Inc 633 6 Ave Sw #830, Calgary T2P 2Y5 | (403) 266-3800 |
| Sael Inspection Ltd 1740 10 St Sw, Calgary T2T 3E8 | (403) 245-1499 |
| Sioux Oilfield Consultants Ltd 520 35 Ave Ne, Calgary T2E 2K8 | (403) 277-1516 |
| Thomassen Energy Consultants 205 5 Ave Sw #2920, Calgary T2P 2V7 | (403) 262-1863 |
| Trans Mountain Pipe Line Co 300 5 Ave Sw #2700, Calgary T2P 5J2 | (403) 514-6400 |
| Wight Pipeline Management Inc 16530 Sunhaven Rd Se, Calgary T2X 2L8 | (403) 201-7786 |
| Duke Energy Gas Transmission 425 1 St Sw #2600, Calgary T2P 3L8 | (403) 699-1999 |
| Enbridge Inc 600 Palmer Rd Ne, Calgary T2E 7R3 | (403) 291-1043 |
| Express Pipeline Ltd 255 5 Ave Sw #2500, Calgary T2P 3G6 | (403) 645-8000 |
| Fasttrack Enterprises Ltd 7620 Elbow Dr Sw #274, Calgary T2V 1K2 | (403) 287-8384 |
| Foothills Pipe Lines Ltd 707 8 Ave Sw #3100, Calgary T2P 3W8 | (403) 294-4111 |
| Geo-Nav Consulting Inc 104 Pinewind Close Ne, Calgary T1Y 2H3 | (403) 280-4887 |