| Business | Phone |
| Barrick Goldmines Inc 101 Constitution Ave Nw # 665e, Washington 20001 | (202) 682-9499 |
| Kennecott Corp 1325 Pennsylvania Ave Nw # 700, Washington 20004 | (202) 393-0266 |
| Newmont Mining Corp 101 Constitution Ave Nw, Washington 20001 | (202) 822-6777 |