| CICentral Iowa Ready Mix - Audubon Facility | Audubon | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CICentral Iowa Ready Mix Manning | Manning | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CICentral Iowa Ready Mix Mt. Ayr | Mount Ayr | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CICentral Iowa Ready Mix Perry | Perry | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CICentral Iowa Ready Mix Shenandoah | Shenandoah | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CGCertainteed Gypsum & Ceiling Mfg, INC | Fort Dodge | IA | Nonmetallic Mineral Product Manufacturing327420 | — | ◇ UNVERIFIED |
| CMConcrete Mobility | Lakota | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CSConcrete Supply | Council Bluffs | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CSConstruction Safety Experts INC. | De Witt | IA | Nonmetallic Mineral Product Manufacturing327215 | — | ◇ UNVERIFIED |
| FSFour Seasons Excavation and Landscaping, INC. | West Burlington | IA | Nonmetallic Mineral Product Manufacturing327999 | — | ◇ UNVERIFIED |
| GAGcc Alliance - Cherokee Washborn | Cherokee | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| GRGcc Ready Mix | Sergeant Bluff | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| HRHamilton Ready Mix | Fort Dodge | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| HRHawkeye Ready Mix | Iowa City | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| HRHawkeye Ready-mix, INC. | Cedar Rapids | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| IRIdeal Ready Mix - Chariton | Chariton | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| IRIdeal Ready Mix - Fort Madison | Fort Madison | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| IRIdeal Ready Mix - Mt. Pleasant | Mount Pleasant | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| IRIdeal Ready Mix - Ottumwa | Ottumwa | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| IRIdeal Ready Mix - Pella | Pella | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| IRIdeal Ready Mix - Washington | Washington | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| IRIdeal Ready Mix - West Burlington | West Burlington | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| IPIJA Properties LLC | Farley | IA | Nonmetallic Mineral Product Manufacturing327390 | — | ◇ UNVERIFIED |
| LCLiebus Concrete, Inc. | Oskaloosa | IA | Nonmetallic Mineral Product Manufacturing327390 | — | ◇ UNVERIFIED |
| LCLiebus Concrete, Inc. | Oskaloosa | IA | Nonmetallic Mineral Product Manufacturing327390 | — | ◇ UNVERIFIED |
| MGMid-American Glass, Inc. | Davenport | IA | Nonmetallic Mineral Product Manufacturing327215 | — | ◇ UNVERIFIED |
| MCMidland Concrete Products | Hiawatha | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| MCMobile Crushing and Recycling, INC | Otho | IA | Nonmetallic Mineral Product Manufacturing327999 | — | ◇ UNVERIFIED |
| NGNational Gypsum Company - Fort Dodge | Fort Dodge | IA | Nonmetallic Mineral Product Manufacturing327420 | — | ◇ UNVERIFIED |
| NRNorwalk Ready Mixed Concrete INC. - Desoto | Desoto | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| RURail.one USA CORP. | Clinton | IA | Nonmetallic Mineral Product Manufacturing327390 | — | ◇ UNVERIFIED |
| SSShondel's Stone Creations | Centerville | IA | Nonmetallic Mineral Product Manufacturing327390 | — | ◇ UNVERIFIED |
| SRStandard Ready Mix - Sergeant Bluff Plant | Sergeant Bluff | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| TMTcc - Muscatine | Muscatine | IA | Nonmetallic Mineral Product Manufacturing327390 | — | ◇ UNVERIFIED |
