| Business | Phone |
| Soil Testing & Engineering Inc 2283 Waynoka Rd # C, Colorado Springs 80915 | (719) 591-0605 |
| Earth Engineering Consultants 1036 Elkton Dr, Colorado Springs 80907 | (719) 442-6813 |
| North American Testing 704 Hathaway Dr, Colorado Springs 80915 | (719) 574-5423 |
| North American Testing 7777 Wildridge Rd, Colorado Springs 80908 | (719) 495-2200 |
| Hildenbrandt & Assoc 5376 Tomah Dr # 113, Colorado Springs 80918 | (719) 535-9894 |
| Kleinfelder 4815 List Dr # 115, Colorado Springs 80919 | (719) 632-3593 |