| Fells | Portland | ME |
| Fenway Motel | Auburn | ME |
| Forest City Sugar Refining | Portland | ME |
| Forster Manufacturing | Strong | ME |
| Forster Manufacturing | Mattawamkeag | ME |
| Fort James Operating | Old Town | ME |
| Fort Kent Hospital | Fort Kent | ME |
| Foster Wheeler | Millinocket | ME |
| FPL Energy | Wiscasset | ME |
| Frary Wood Turning | Wilton | ME |
| Fraser Paper | Madawaska | ME |
| George Eldridge | South Portland | ME |
| George Hanley | South Portland | ME |
| George L. Farley | South Portland | ME |
| George N. Seger | South Portland | ME |
| Georgia Pacific | Woodland | ME |
| Georgia Pacific | Baileyville | ME |
| G. Isaacs | Wiscasset | ME |
| Good Will Home Association | Hinckley | ME |
| Gorbell/Thermo Electron Power Plant | Athens | ME |
| Great Northern Paper | Millinocket | ME |
| Great Northern Paper | Norcross | ME |
| Great Northern Paper | Lincoln | ME |
| Great Northern Paper | Madison | ME |
| Great Northern Paper | East Millinocket | ME |
| Guilford Mills | Guilford | ME |
| Hardwood Products | Guilford | ME |
| Hartland Tanning | Hartland | ME |
| Harvey F. Gamage Shipbuilder | South Bristol | ME |
| Heard Pidr | Pejepscot | ME |
| Hearst | Brunswick | ME |
| Hearst | Pejepscot | ME |
| Helen M. King Middle School | Portland | ME |
| Hill Manufacturing | Lewiston | ME |
| Hollingsworth & Whitney | Waterville | ME |
| Houlton Water Works & Pumping Station | Houlton | ME |
| Hudson Pulp & Paper | Augusta | ME |
| Hyde Windlass | Bath | ME |
| Imc Chlor-Alkali Plant | Orrington | ME |
| Indeck Energy Services | Jonesboro | ME |
| Indeck Energy Services | West Enfield | ME |
| International Paper | Bucksport | ME |
| International Paper | Livermore | ME |
| International Paper | Webster | ME |
| International Paper | Chisholm | ME |
| International Paper | Lisbon Falls | ME |
| International Paper | Livermore Falls | ME |
| International Paper | Waterville | ME |
| International Paper | Jay | ME |
| International Paper | Costigan | ME |
