A · B · C · D · E · F · G · H · I · J · K · L · M · N · O · P · Q · R · S · T · V · W · Z · 0-9
| Company | Location | County | Certifications | License # |
|---|---|---|---|---|
| R & D Hendrickson Trucking LLC | Rolla, ND | — | Installer | — |
| R&D Hendrickson Trucking LLC | Rolla, ND | Rolette | Pumper (Class I) | NDSP007279 |
| R&R Trenching and Dirtworks LLC | New UnderwooSdD, ND | — | Installer | — |
| Rachel Contracting, LLC | St. Michael, MN | — | Installer | — |
| Rahm Excavating, Inc. | Foreston, MN | — | Installer | — |
| Rapid Response Plumbing | Monango, ND | — | Installer | — |
| Red River Excavating | Moorhead, MN | — | Installer | — |
| Reiland Bros Plumbing, LLC | Colfax, ND | — | Installer | — |
| Removal Inc Nygard Construction | Garrison, ND | — | Installer | — |
| Renner Excavating | Horace, ND | — | Installer | — |
| Ritterman Excavating, LLC | York, ND | — | Installer | — |
| RJ's Plumbing and Heating | Valley City, ND | — | Installer | — |
| Rock's Egress and Concrete | Trenton, ND | — | Installer | — |
| Ron's Rural Backhoe | Dickinson, ND | — | Installer | — |
| Roto-Rooter-Grand Forks | Grand Forks, ND | Grand Forks | Pumper (Class I) | NDSP007315 |
| Roughrider Septic | Dickinson, ND | Dunn | Pumper (Class I) | NDSP007338 |
| Royal Septic, LLC | Bismarck, ND | Emmons | Pumper (Class II) | NDSP007305 |
| RT Enterprises | Battleview, ND | Burke | Pumper (Class I) | NDSP007394 |
| Rush, Cliff | Rolla, ND | — | Installer | — |
| RV Enterprises | Balfour, ND | — | Installer | — |
| Ryan Lee Keplin | Belcourt, ND | — | Installer | — |
A · B · C · D · E · F · G · H · I · J · K · L · M · N · O · P · Q · R · S · T · V · W · Z · 0-9