| Business | Phone |
| Greenacres Gypsum & Lime Co 17900 E Euclid Ave, Spokane 99216 | (509) 924-5550 |
| International Raw Materials 421 W Riverside Ave 254, Spokane 99201 | (509) 747-1010 |
| Wilbur-Ellis Co 12001 E Empire Ave, Spokane 99206 | (509) 928-4512 |
| Yara North America Inc 1314 S Grand Blvd 2 Pmb 130, Spokane 99202 | (509) 838-0470 |