| Agricultural Products | Conda | ID |
| Allis Chalmers | Buhl | ID |
| Amalgamated Sugar | Fischer | ID |
| Amalgamated Sugar | Preston | ID |
| Amalgamated Sugar | Nampa | ID |
| Amalgamated Sugar | Paul | ID |
| Amalgamated Sugar | Burley | ID |
| Amalgamated Sugar | Twin Falls | ID |
| Atlas Boiler | Montpelier | ID |
| Atomic Energy Commission | Scoville | ID |
| Atomic Energy Commission | Idaho Falls | ID |
| Beet Growers Sugar | Rigby | ID |
| Bennett Lumber | Princeton | ID |
| Boise Cascade | Emmett | ID |
| Boise Cascade | Boise | ID |
| Bunker Hill | Kellogg | ID |
| Bunker Hill Smelter | Kellogg | ID |
| Bunker Hill Sullivan Mine | Kellogg | ID |
| Bunker Hill & Sullivan Mining & Concentrating | Kellogg | ID |
| California Packing | Franklin | ID |
| Callahan Mining | Osburn | ID |
| Capital High School | Boise | ID |
| Carnation Milk Products | Nampa | ID |
| C. F. Braun | Idaho Falls | ID |
| C F Warehouse | Scoville | ID |
| Chandler Supply | Boise | ID |
| Clayton Silver Mines | Clayton | ID |
| Clover Club Foods | Boise | ID |
| Craig Mountain Lumber | Winchester | ID |
| Cyprus Mines | Clayton | ID |
| Dairymans Cooperative Creamery | Caldwell | ID |
| Day Mines | Wallace | ID |
| Deatley | Lewiston | ID |
| Del Monte | Burley | ID |
| Del Monte | Franklin | ID |
| Ebr-Ii Power Plant | Pocatello | ID |
| E.G. & G. | Idaho Falls | ID |
| Empire Copper | Mackay | ID |
| Evergreen Forest Products | Tamarack | ID |
| Federal Building | Sandpoint | ID |
| Fluor Corporation | Pocatello | ID |
| FMC | Pocatello | ID |
| FMC | Don | ID |
| Franklin County Sugar | Whitney | ID |
| Franklin County Sugar | Preston | ID |
| Gate City Steel | Pocatello | ID |
| Hecla Mining | Burke | ID |
| Howards Building Supply | Grangeville | ID |
| Howard S. Wright & Associates | Idaho Falls | ID |
| Idaho Exteriors | Caldwell | ID |
