| Business | Phone |
| Ambassador Steel Corp 1119 4th St 211, Sioux City 51101 | (712) 239-1168 |
| American Towers & Structures 2600 Highway 75 N, Sioux City 51105 | (712) 252-0240 |
| Missouri Valley Steel Co 1300 Division St, Sioux City 51105 | (712) 255-1616 |
| Royal Iron Inc 2240 Hawkeye Dr, Sioux City 51105 | (712) 258-7713 |
| Sioux City Foundry Co 801 Division St, Sioux City 51105 | (712) 252-4181 |