1 | IWSX | Illinois-Wisconsin Sand & Gravel Co. | added 7/1972; 1/1975-1/1980; eliminated 10/1980 | | NAKINA |
2 | IWSX | Illinois-Wisconsin Sand & Gravel Co. | 1/75-1/80; eliminated 10/80 | | NRHS |
3 | IWSX | ILLINOIS-WISCONSIN SAND & GRAVEL CO | | | PWRC |
4 | IWSX | ILLINOIS-WISCONSIN SAND & GRAVEL CO | | | SCAC4 |