| Business | Phone |
| American Surveys 13338 Colfax Hwy, Grass Valley 95945 | (530) 273-0640 |
| John Spencer Po Box 912, Grass Valley 95945 | (530) 272-2041 |
| California Survey Co 136 Idaho Maryland Rd, Grass Valley 95945 | (530) 273-6651 |
| David Graebner Surveying 10941 Sunrise Hts, Grass Valley 95945 | (530) 273-5833 |
| Dundas & Dundas 16906 Aileen Way, Grass Valley 95949 | (530) 274-1616 |
| Grass Valley Land Surveying 13031 Oak Hill Rd, Grass Valley 95949 | (530) 274-2433 |
| Jkl Surveying 10936 Lovas Ct, Grass Valley 95945 | (530) 477-7343 |
| Root Surveying Grass Valley 95945 | (530) 432-7952 |
| Keith Waters 12437 Polaris Dr, Grass Valley 95949 | (530) 272-6922 |