| Business | Phone |
| Cal West Grading & Concrete Po Box 4316, Napa 94558 | (707) 224-8743 |
| Napa County Public Works 4300 Spanish Flat Loop Rd, Napa 94558 | (707) 966-2421 |
| Napa County Public Works 933 Water St, Napa 94559 | (707) 253-4249 |
| Napa County Public Works Dept 1195 3rd St, Napa 94559 | (707) 253-4351 |
| Napa County Public Works Dept 7292 Silverado Trl, Napa 94558 | (707) 944-0196 |