| Business | Phone |
| Blackhawk Geoservices 301 Commercial Rd # B, Golden 80401 | (303) 278-8700 |
| Stratasearch Corp 1019 8th St, Golden 80401 | (303) 278-8505 |
| Layne Geosciences Inc 17301 W Colfax Ave # 265, Golden 80401 | (303) 279-0171 |
| Karst Geophysics 257 Alpine Ave, Golden 80401 | (303) 526-0554 |