| Aaron R. Huddleston, Dba Huddleston Construction | Lincoln City, OR | Installer | 38614 |
| Bales Bros Excavation Llc | Waldport, OR | Installer | 37711 |
| Ct Thissell, Inc | Tidewater, OR | Installer | 39065 |
| David Smallwood Land Services Llc | Tidewater, OR | Installer | 39818 |
| Donald J. Drayton, Dba Rural Systems | Neotsu, OR | Installer | 38199 |
| George M. Dollowitch, Dba Dollowitch & Morgan | Waldport, OR | Installer | 37128 |
| Halvorson Mason Corp | Lincoln City, OR | Installer | 39135 |
| James W. Drayton, Dba James W. Drayton Trucking & Excavating | Lincoln City, OR | Installer | 36219 |
| Jon M Thompson Excavation, Llc | Lincoln City, OR | Installer | 38788 |
| Joseph R. Howry, Dba Howry Industries | Toledo, OR | Installer | 38719 |
| Justin Christian Haft, Dba Haft Excavating | Otis, OR | Installer | 37613 |
| Kauffman-Riedesel, Inc | Lincoln City, OR | Installer | 36559 |
| Kerry W. Sweitz And Laura E. Sweitz, Dba K.W. Sweitz Trucking And Backhoe | Otis, OR | Installer | 36958 |
| Larry E Johnson Excavating Inc | Southbeach, OR | Installer | 37612 |
| Larry Thissell Logging Inc | Tidewater, OR | Installer | 35438 |
| M&E Septic Service, Inc | Waldport, OR | Pumper | 38704 |
| Northwest Septic Service Inc | Otis, OR | InstallerPumper | 38958 |
| Page Concrete Construction, Inc | Otis, OR | Installer | 39307 |
| Paul Wayne Lindsey, Dba Paul Lindsey Trucking And Excavation | Otis, NJ | Installer | 38550 |
| Rk Excavation Llc | Otis, OR | Installer | 39325 |
| Stacy Steven Hyden, Dba Hyden'S Excavating | Toledo, OR | Installer | 36698 |
| T & L Septic Tank Service Llp, Dba T & L Septic Tank Service | Lincoln City, OR | Pumper | 36043 |
| White Works Llc | Otis, OR | Installer | 39684 |