| Ackley Limestone Co | 515-847-3412 | RR 1 | Ackley | IA | 50601 |
| Basic Materials Corp | 515-797-2211 | 3446 Fir Ave | Fertile | IA | 50434 |
| Basic Materials Corp | 515-587-2171 | RR | Garner | IA | 50438 |
| Calcium Products Inc | 515-373-6554 | RR 1 | Gilmore City | IA | 50541 |
| Conleys Trucking | 515-233-2317 | 4376 Dawes Dr | Ames | IA | 50010 |
| Falk L R Construction Co | 515-732-3789 | RR 2 | Osage | IA | 50461 |
| Huber J M Corp | 515-955-8548 | RR 3 | Fort Dodge | IA | 50501 |
| Iowa Limestone Co | 515-243-8106 | 500 New York Ave | Des Moines | IA | 50313 |
| Jackson Truck & Auto Sales | 515-856-8275 | 700 E Wilson St | Centerville | IA | 52544 |
| John's Ag Service | 515-332-1883 | 2260 220th St | Humboldt | IA | 50548 |
| Kaser Corp | 515-673-9440 | 2097 310th St | Oskaloosa | IA | 52577 |
| Kaser Corporation | 515-969-4652 | RR | Eddyville | IA | 52553 |
| Kaser Corporation | 515-949-6211 | New Harvey Sand & Gravel P | Tracy | IA | 50256 |
| Kaser Corporation | 515-842-4181 | Durham Mine | Harvey | IA | 50119 |
| Kaser Corporation | 515-278-0205 | 7200 Hickman Rd | Des Moines | IA | 50322 |
| Kaser Corporation Mine | 515-594-2966 | 5046 E 132nd St | Sully | IA | 50251 |
| L & W Quarries Inc Main Ofc | 515-437-4830 | Lake Cntr Mall | Centerville | IA | 52544 |
| L & W Quarries Inc Quarry No 8 | 515-437-1512 | Lake Cntr Mall | Centerville | IA | 52544 |
| Lr Falk Construction Co Office | 515-736-4569 | 227 W 4th St | Saint Ansgar | IA | 50472 |
| Martin Marietta Aggregates | 515-528-2475 | RR 3 | Grinnell | IA | 50112 |
| Martin Marietta Aggregates | 515-332-1256 | 2314 210th St | Humboldt | IA | 50548 |
| Martin Marietta Aggregates Inc | 515-832-4430 | RR | Webster City | IA | 50595 |
| Martin Marietta Aggregates Inc | 515-573-8151 | RR 3 | Fort Dodge | IA | 50501 |
| Mitchell Thomas & Pat | 515-627-5236 | RR 1 | Otley | IA | 50214 |
| Randall Transit Mix Co | 515-324-1063 | RR 3 | Northwood | IA | 50459 |
| Reed Ronald J Trucking | 515-969-5574 | RR 1 | Eddyville | IA | 52553 |
| Sandusky Charles A | 515-357-4165 | 1600 W 6th Ave N | Clear Lake | IA | 50428 |
| Schildberg Construction Co Inc | 515-743-2131 | 108 SE 6th St | Greenfield | IA | 50849 |
| Schildberg Construction Compan | 515-224-7625 | 1025 Ashworth Rd | West Des Moines | IA | 50265 |
| West Des Moines Sand Co | 515-287-2340 | 10500 SW 52 Av | Bloomfield | IA | 50321 |
