| Heidelberg Materials US Cement LLC | Mason City Plant | IA | 56.16005 |
| Heidelberg Materials US Cement LLC | Mason City Plant | IA | 56.4201(a)(1) |
| River Products Company Inc | Conklin Quarry and Mill | IA | 56.12018 |
| River Products Company Inc | Conklin Quarry and Mill | IA | 56.12028 |
| Heidelberg Materials US Cement LLC | Mason City Plant | IA | 56.17001 |
| Heidelberg Materials US Cement LLC | Mason City Plant | IA | 56.16006 |
| Heidelberg Materials US Cement LLC | Mason City Plant | IA | 56.4011 |
| Heidelberg Materials US Cement LLC | Mason City Plant | IA | 56.4201(a)(1) |
| Heidelberg Materials US Cement LLC | Mason City Plant | IA | 56.12028 |
| Heidelberg Materials US Cement LLC | Mason City Plant | IA | 56.20003(a) |
| Heidelberg Materials US Cement LLC | Mason City Plant | IA | 56.4201(a)(1) |
| Heidelberg Materials US Cement LLC | Mason City Plant | IA | 56.20003(a) |
| Heidelberg Materials US Cement LLC | Mason City Plant | IA | 56.17001 |
| Heidelberg Materials US Cement LLC | Mason City Plant | IA | 56.11001 |
| Heidelberg Materials US Cement LLC | Mason City Plant | IA | 56.11001 |
| Heidelberg Materials US Cement LLC | Mason City Plant | IA | 47.44(b) |
| Heidelberg Materials US Cement LLC | Mason City Plant | IA | 56.12032 |
| Heidelberg Materials US Cement LLC | Mason City Plant | IA | 56.12028 |
| Heidelberg Materials US Cement LLC | Mason City Plant | IA | 56.12034 |
| Heidelberg Materials US Cement LLC | Mason City Plant | IA | 56.12028 |
| Heidelberg Materials US Cement LLC | Mason City Plant | IA | 56.11003 |
| Overland Systems Inc | Leclaire Portable Crusher #2 | IA | 56.4201(b) |
| Linwood Mining and Minerals Corporation | Linwood Mine | IA | 57.12008 |
| Linwood Mining and Minerals Corporation | Linwood Mine | IA | 57.4200(b)(2) |
| Linwood Mining and Minerals Corporation | Linwood Mine | IA | 57.4130(a)(2) |
| Linwood Mining and Minerals Corporation | Linwood Mine | IA | 57.11003 |
| Linwood Mining and Minerals Corporation | Linwood Mine | IA | 57.11002 |
| Schildberg Construction Company Inc | Stripping #8 | IA | 56.4130(b) |
| Linwood Mining and Minerals Corporation | Linwood Mine | IA | 57.3200 |
| Linwood Mining and Minerals Corporation | Linwood Mine | IA | 57.4200(b)(2) |
| Schildberg Construction Company Inc | Stripping #4 | IA | 56.11002 |
| Schildberg Construction Company Inc | Stripping #4 | IA | 47.44(b) |
| Linwood Mining and Minerals Corporation | Linwood Mine | IA | 57.4104(a) |
| Linwood Mining and Minerals Corporation | Linwood Mine | IA | 57.12004 |
| Martin Marietta Materials, Inc. | Fort Dodge Mine | IA | 57.12020 |
| Thunder Industries Inc | AMES MINE | IA | 57.11003 |
| Preston Ready Mix Corp | PRESTON QUARRY | IA | 56.4101 |
| Preston Ready Mix Corp | PRESTON QUARRY | IA | 56.12004 |
| Martin Marietta Materials, Inc. | AMES MINE | IA | 57.4102 |
| Martin Marietta Materials, Inc. | AMES MINE | IA | 57.3200 |
| Money Pit LLC | Mill Creek Pit | IA | 50.30(a) |
| Money Pit LLC | Mill Creek Pit | IA | 56.23003(b) |
| Money Pit LLC | Mill Creek Pit | IA | 56.16005 |
| Grey Rock Inc | Davenport Plant | IA | 47.44(b) |
| Continental Cement Company, LLC | Davenport Plant | IA | 56.11003 |
| Continental Cement Company, LLC | Davenport Plant | IA | 56.12028 |
| Continental Cement Company, LLC | Davenport Plant | IA | 56.16001 |
| Wendling Quarries Inc | Portable Wash Plant Dept 472 | IA | 56.12028 |
| Martin Marietta Materials Inc. | Des Moines Portable #1 | IA | 56.12004 |
| Continental Cement Company, LLC | Davenport Plant | IA | 47.44(b) |
| Continental Cement Company, LLC | Davenport Plant | IA | 56.4101 |
| Continental Cement Company, LLC | Davenport Plant | IA | 56.4011 |
| Continental Cement Company, LLC | Davenport Plant | IA | 56.11003 |
| Continental Cement Company, LLC | Davenport Plant | IA | 56.4104(a) |
| Wendling Quarries, Inc. | PORTABLE CRUSHING PLANT #202 | IA | 56.12032 |
| Martin Marietta Materials Inc. | Des Moines Portable #1 | IA | 56.9300(b) |
| Continental Cement Company, LLC | Davenport Plant | IA | 56.4200(b)(2) |
| Continental Cement Company, LLC | Davenport Plant | IA | 56.12030 |
| Continental Cement Company, LLC | Davenport Plant | IA | 56.16005 |
| Continental Cement Company, LLC | Davenport Plant | IA | 56.13021 |
| Continental Cement Company, LLC | Davenport Plant | IA | 56.20003(a) |
| Continental Cement Company, LLC | Davenport Plant | IA | 56.4602 |
| Continental Cement Company, LLC | Davenport Plant | IA | 56.4104(a) |
| Beneficial Technologies LLC | Beneficial Technologies | IA | 47.44(b) |
| L R Falk Construction Company | 72 Plant | IA | 56.12008 |
| L R Falk Construction Company | 72 Plant | IA | 56.12004 |
| Viking Aggregates, Inc. | Kahoka Portable Wash Plant | IA | 56.16001 |
| Viking Aggregates, Inc. | Kahoka Portable Wash Plant | IA | 56.12004 |
| Bruening Rock Products Inc. | Stripping Crew #1 | IA | 56.4201(a)(1) |
| Wendling Quarries Inc | Portable Wash Dept 475 | IA | 56.12028 |
| Wendling Quarries Inc | Portable Dredge Dept 485 | IA | 56.11003 |
| Schildberg Construction Company Inc | PLANT #1 | IA | 56.12032 |
| L R Falk Construction Company | 400 CONE PLANT (Trenhaile Quarry) | IA | 56.4200(b)(2) |
| L R Falk Construction Company | 400 CONE PLANT (Trenhaile Quarry) | IA | 56.12004 |
| L R Falk Construction Company | 400 CONE PLANT (Trenhaile Quarry) | IA | 56.12004 |
| Popp Excavating Llc | 400 CONE PLANT (Trenhaile Quarry) | IA | 56.4101 |
| Popp Excavating Llc | 400 CONE PLANT (Trenhaile Quarry) | IA | 56.4201(a)(1) |
| L R Falk Construction Company | 400 CONE PLANT (Trenhaile Quarry) | IA | 56.12004 |
| Schildberg Construction Company Inc | PLANT #3 | IA | 56.6132(a)(4) |