| Business | Phone |
| Us Occupation Safety & Health 8344 E R L Thornton Fwy, Dallas 75228 | (214) 320-2400 |
| Federal Mediation Conciliation 1100 Commerce St 306, Dallas 75242 | (214) 767-2917 |
| Us Merit Syst Protection Board 1100 Commerce St 620, Dallas 75242 | (214) 767-0555 |
| Us Mine Safety & Health Adm 1100 Commerce St 4c50, Dallas 75242 | (214) 767-8401 |