| Business | Phone |
| Cunningham Engineering Co 2940 Spafford St, Davis 95616 | (530) 758-2026 |
| N K Engineering & Surveying Co 724 G St, Davis 95616 | (530) 758-6490 |
| West Yost & Assoc 1260 Lake Blvd # 240, Davis 95616 | (530) 756-5905 |
| Canvasback Engineering 1225 Aspen Pl, Davis 95616 | (530) 756-5200 |