| Basic Materials Corp | 319-342-2299 | 11305 Dysart Rd | La Porte City | IA | 50651 |
| Basic Materials Corp Quarry | 319-275-4470 | 1144 Midway Ave | Tripoli | IA | 50676 |
| Basic Materials Corporate & Sales Office | 319-235-6583 | 2625 W Airline Hwy | Waterloo | IA | 50703 |
| Behrends Crushed Stone | 319-465-4035 | RR 3 | Monticello | IA | 52310 |
| Bruening Rock Products Inc | 319-776-6261 | Rt 1 | Jackson Junction | IA | 52150 |
| Bruening Rock Products Inc | 319-547-5218 | RR 3 | Lime Springs | IA | 52155 |
| Bruening Rock Products Inc | 319-334-4292 | Hwy 20 E | Independence | IA | 50644 |
| Chadek Carl Trucking Service | 319-338-8390 | 515 3rd Ave | Iowa City | IA | 52245 |
| Coots Materials Co Office | 319-472-4480 | 1700 W D St | Vinton | IA | 52349 |
| Coots Materials Co Orders Customer Service | 319-472-3046 | 1700 W D St | Vinton | IA | 52349 |
| Eastern Iowa Propane Ltd | 319-242-2921 | 4540 Lincolnway St | Clinton | IA | 52732 |
| Folkerts & Son Lime & Rock | 319-345-6366 | 110 Hillcrest Dr | Reinbeck | IA | 50669 |
| Folkerts & Son Lime & Rock Dial Scott Wical | 319-345-6638 | 110 Hillcrest Dr | Reinbeck | IA | 50669 |
| Gaffney Quarries Inc | 319-924-2624 | RR 1 | Lamont | IA | 50650 |
| J & S Mercantile | 319-347-2759 | 216-10th St | Aplington | IA | 50604 |
| Kasper Backhoe Service | 319-354-4425 | 5312 Sand Rd SE | Iowa City | IA | 52240 |
| Kuhlman Quarries | 319-927-2220 | 917 E Main St | Manchester | IA | 52057 |
| Kuhlman Quarries | 319-875-7580 | 2125 2nd Ave SE | Dyersville | IA | 52040 |
| Kurt Kevin Trucking | 319-875-2076 | 430 4th Ave NE | Dyersville | IA | 52040 |
| Leclaire Investment Co | 319-289-4214 | 400 Territorial Rd | Le Claire | IA | 52753 |
| Linwood Mining & Minerals Corp Sales Ofc | 319-359-8251 | 4321 E 60th St | Davenport | IA | 52807 |
| Miller Quarry-Quarry Scale | 319-334-4881 | 2400 King Av | Independence | IA | 50644 |
| Nieman Paul Construction Co | 319-882-3079 | 2131 160th St | Tripoli | IA | 50676 |
| Niemann Paul Construction Co | 319-984-5971 | RR 2 | Denver | IA | 50622 |
| Niemann Paul Construction Co | 319-267-2956 | RR | Allison | IA | 50602 |
| Niemann Paul Construction Company | 319-827-6660 | 1165 220th St | Jesup | IA | 50648 |
| Niemann Paul Quarry | 319-635-2004 | 2683 Hwy V68 | Fairbank | IA | 50629 |
| Niemann Paul Quarry | 319-636-2967 | RR | Hazleton | IA | 50641 |
| Niemann Paul Quarry | 319-422-3007 | RR | West Union | IA | 52175 |
| Thome Joe & Agie | 319-827-6130 | 6615 Lafayette Rd | Raymond | IA | 50667 |
| Vulcan Materials Co Test Dept | 319-364-7812 | Mount Vernon Rd SE | Cedar Rapids | IA | 52401 |
| Wellman Farm Center | 319-646-6780 | 1340 Fir Ave | Wellman | IA | 52356 |
| Wiltgen Construction Co | 319-562-3301 | 113 N Main St | Calmar | IA | 52132 |
