| HMHarsco Metals | Muscatine | IA | Nonmetallic Mineral Product Manufacturing327992 | — | ◐ LIKELY ACTIVE |
| HPHawkeye Pedershaab Concrete Technologies, INC | Mediapolis | IA | Nonmetallic Mineral Product Manufacturing327390 | — | ◐ LIKELY ACTIVE |
| HRHawkeye Ready Mix Hiawatha | Hiawatha | IA | Nonmetallic Mineral Product Manufacturing327310 | 20-99 | ◐ LIKELY ACTIVE |
| KRKing's Ready Mix | Cedar Rapids | IA | Nonmetallic Mineral Product Manufacturing327320 | 20-99 | ◐ LIKELY ACTIVE |
| MCMidland Concrete Products Clear Lake | Clear Lake | IA | Nonmetallic Mineral Product Manufacturing327331 | 20-99 | ◐ LIKELY ACTIVE |
| MCMonarch Cement of Iowa INC | Des Moines | IA | Nonmetallic Mineral Product Manufacturing327310 | — | ◐ LIKELY ACTIVE |
| MEMPC Enterprises Inc | Mount Pleasant | IA | Nonmetallic Mineral Product Manufacturing327390 | 100-499 | ◐ LIKELY ACTIVE |
| RORail One USA CORP | Clinton | IA | Nonmetallic Mineral Product Manufacturing327390 | 1-19 | ◐ LIKELY ACTIVE |
| CICentral Iowa Ready Mix | West Des Moines | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◐ LIKELY ACTIVE |
| CMC.j. Moyna & Sons INC | Iowa | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◐ LIKELY ACTIVE |
| CCContinental Cement Company | Buffalo | IA | Nonmetallic Mineral Product Manufacturing327310 | — | ◐ LIKELY ACTIVE |
| DPDukes Properties | Des Moines | IA | Nonmetallic Mineral Product Manufacturing327390 | — | ◐ LIKELY ACTIVE |
| GBGold Bond - Ftd Plant | Fort Dodge | IA | Nonmetallic Mineral Product Manufacturing327420 | — | ◐ LIKELY ACTIVE |
| HIHoffmann INC | Muscatine | IA | Nonmetallic Mineral Product Manufacturing327120 | — | ◐ LIKELY ACTIVE |
| HIHolcim (us) INC - Mason City | Mason City | IA | Nonmetallic Mineral Product Manufacturing327310 | — | ◐ LIKELY ACTIVE |
| MIManatts INC | Ankeny | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◐ LIKELY ACTIVE |
| NRNorthwest Ready-mix | Ocheyedan | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◐ LIKELY ACTIVE |
| ACAmerican Concrete Products | Johnston | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| ACAmerican Concrete Products - Guthrie Center | Guthrie Center | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| ACAmerican Concrete Products INC | Jefferson | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| ACAmerican Concrete Products INC | Adel | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| ACAmerican Concrete Products INC | Lakota | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| ACAmerican Concrete Products Incorporated | Mount Ayr | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| APAndrews Prestressed Concrete INC | Clear Lake | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| AAArch Aluminum & Glass CO INC | Bettendorf | IA | Nonmetallic Mineral Product Manufacturing327215 | — | ◇ UNVERIFIED |
| ARA-tec Recycling INC | Des Moines | IA | Nonmetallic Mineral Product Manufacturing327212 | — | ◇ UNVERIFIED |
| BMBard Materials | Dyersville | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| BEBlended Equipment Solutions | Altoona | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CPCalcium Products INC | Fort Dodge | IA | Nonmetallic Mineral Product Manufacturing327410 | — | ◇ UNVERIFIED |
| CGCardinal Glass | Greenfield | IA | Nonmetallic Mineral Product Manufacturing327211 | — | ◇ UNVERIFIED |
| CICargill Inc-sioux City-refinery | Sioux City | IA | Nonmetallic Mineral Product Manufacturing327212 | — | ◇ UNVERIFIED |
| CRCemstone--clarion Ready Mix Plant | Clarion | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CCCemstone Concrete Materials-algona | Algona | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CCCemstone Concrete Materials-northwood | Northwood | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CICentral Iowa Ready Mix | Carroll | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CICentral Iowa Ready Mix | Boone | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CICentral Iowa Ready Mix | Des Moines | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CICentral Iowa Ready Mix | Des Moines | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CICentral Iowa Ready Mix Greenfield | Greenfield | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CICentral Iowa Ready Mix - Plant #3 - Grimes | Grimes | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CICentral Iowa Ready Mix Red Oak | Red Oak | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CICentral Iowa Ready Mix Shenandoah | Shenandoah | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CRCohron Ready Mix-council Bluffs | Council Bluffs | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CIConcrete INC - Gifford | Union | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CTConcrete Technologies INC | Urbandale | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CTConcrete Technologies, INC | Grimes | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CCContinental Cement | West Des Moines | IA | Nonmetallic Mineral Product Manufacturing327310 | — | ◇ UNVERIFIED |
| CLCozzini Llc-iowa Manufacturing Facility | Algona | IA | Nonmetallic Mineral Product Manufacturing327910 | — | ◇ UNVERIFIED |
| CRCroell Redi-mix Cedar Rapids | Cedar Rapids | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CRCroell Redi-mix INC | Mason City | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |