| 9-Gk Construction And Excavation Llc | Prineville, OR | Installer | 39838 |
| Allied Waste Transfer Services Of Oregon, Llc, Dba Middleton Septic & Portable Toilets | Prineville, OR | Pumper | 36032 |
| Allied Waste Transfer Services Of Oregon, Llc, Dba Septic Pros | Prineville, OR | InstallerPumper | 38200 |
| Ashley Homes Inc, Dba Ashley General Contractors | Prineville, OR | Installer | 39404 |
| Blackrock Contracting Inc | Prineville, OR | Installer | 39812 |
| Central Oregon Septic & Excavating, Llc | Prineville, OR | Installer | 37731 |
| Georges Septic Tank Service, Inc | Prineville, OR | Pumper | 34266 |
| High Ridge Excavation, Llc | Prineville, OR | Installer | 39393 |
| J&S Drain Services | Prineville, OR | InstallerPumper | 39483 |
| Mountainside Excavation, Llc | Powell Butte, OR | Installer | 39462 |
| Northwest Land Specialties, Llc | Prineville, OR | Installer | 39222 |
| Ranch Country Portable Toilets Llc Dba Ranch Country Outhouses | Prineville, OR | Pumper | 39611 |
| Rmc Contracting, Llc. | Prineville, OR | Installer | 38873 |
| Rodney L. Collman, Dba Rod Collman Construction | Prineville, OR | Installer | 37236 |
| Shortreed Excavation Llc | Prineville, NJ | Installer | 39783 |
| Smaf Construction, Llc | Prineville, OR | Installer | 37492 |
| Summit Sanitation Llc, Dba Alpha Site Services | Prineville, OR | Pumper | 39969 |
| Tanner Ole Brown, Dba Greenbar Excavation | Prineville, OR | InstallerPumper | 39103 |
| Three Forks Excavation Inc | Powell Butte, OR | Installer | 39868 |
| Tim Bloom Construction, Inc. | Prineville, OR | Installer | 38316 |
| Wade Rogers Excavation, Llc | Powell Butte, OR | Installer | 38475 |
| Watkins Excavation Llc | Prineville, OR | Installer | 39434 |
| Wilkinson Excavation Llc | Prineville, OR | Installer | 39380 |
| Willow Creek Excavation Llc | Prineville, OR | Installer | 39382 |
| Yancey Excavation Llc | Prineville, OR | Installer | 39410 |