| Business | Phone |
| Drummond Mechanical Contrs Inc 910 Dinwiddie Cir, Columbia 65202 | (573) 443-4901 |
| Officer Mechanical Contractors 2306 N Oakland Gravel Rd, Columbia 65202 | (573) 474-3554 |
| J Louis Crum Corp 1312 N Creasy Springs Rd, Columbia 65202 | (573) 443-2488 |