| Business | Phone |
| Rainbow Engineering Inc 32 Coral Springs Pk Ne, Calgary T3J 3Y3 | (403) 293-6998 |
| Clifton Associates Ltd 665 8 St Sw #300, Calgary T2P 3K7 | (403) 263-2556 |
| Curtis Engineering Assoc Ltd 820 28 St Ne #1, Calgary T2A 6K1 | (403) 273-5868 |
| Geo-Engineering Ltd 3016 19 St Ne #217, Calgary T2E 6Y9 | (403) 250-8850 |