| LRLeone Ready Mix LLC | Trinidad | CO | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| LMLibrestone Marble & Granite, LLC | Commerce City | CO | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| LPLindsay Precast, INC. | Colorado Springs | CO | Nonmetallic Mineral Product Manufacturing327390 | — | ◇ UNVERIFIED |
| LLL & L Ready Mix Concrete - Haxtun | Haxtun | CO | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| LLL & L Ready Mix Concrete - Holyoke | Holyoke | CO | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| LCLobato Construction - Mc-8t Plant | Platteville | CO | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| LRLottman Ready Mix - Port Concrete Bp | Hugo | CO | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| LRLoveland Ready Mix Concrete | Loveland | CO | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| LRLoveland Ready Mix Concrete INC | Loveland | CO | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| LSLuxury Stone, INC. | Englewood | CO | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| MGMagallanes Granite and Marble | Denver | CO | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| MOMarquardt Outdoors, Llcdba Davis Tent an D Awning | Denver | CO | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| MCMartinez Const & Dev CO / Hanging Lakes/ Portable | Unk | CO | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| MMMartin Marietta Materials, INC. | Severance | CO | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| MMMartin Marietta - Rigden Ready Mix | Fort Collins Area | CO | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| MMMartin Marietta - South Santa Fe | Erie | CO | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| MSMaster Stone, LLC | Sheridan | CO | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| MGMetro Granite & Marble INC | Denver | CO | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| MLMisb, LLC | Colorado Springs | CO | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| MIM.j. International, LLC | Denver | CO | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| MPMobile Pre Mix-brighton | Brighton, 0.5 Mi Nw of | CO | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| MPMobile Premix Conc.cn | Lone Tree | CO | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| MPMobile Premix Concrete | Henderson | CO | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| MPMobile Premix INC Permit 85lr150 | Fort Collins | CO | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| MRMoffat Ready Mix | Craig | CO | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| MCMontrose Concrete | Montrose | CO | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| MRMontrose Rmc Plant | Montrose | CO | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| MKMorrison Knudsen (mk Ferguson) | Littleton | CO | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| MMMountain Mobile Mix | Minturn | CO | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| MRMountain Redi Mix | Durango | CO | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| MSMountain State Stone | Denver | CO | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| MSMountain Stone, Tile & Marble, LLC | Montrose | CO | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| MCMtg Corporation | Sheridan | CO | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| NINielsons INC | Moffat County (portable) | CO | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| NMNorman's Memorials, Inc. | Wheat Ridge | CO | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| OHODC Holdings LLC | Evans | CO | Nonmetallic Mineral Product Manufacturing327310 | — | ◇ UNVERIFIED |
| OAOldcastle Apg - Loveland | Loveland | CO | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| OIOldcastle Infrastructure - Platteville | Loveland Area | CO | Nonmetallic Mineral Product Manufacturing327390 | — | ◇ UNVERIFIED |
| OSOldcastle Sw Group INC. Dba Four Corners | Durango 4.1 Mi. N of | CO | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| OSOldcastle Sw Group - Minturn Concrete | Minturn | CO | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| OSOldcastle Sw Grp - Gunnison Redi-mix Pit | Gunnison Area | CO | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| OWOldcastle Westile, INC. | Littleton | CO | Nonmetallic Mineral Product Manufacturing327390 | — | ◇ UNVERIFIED |
| OCOrnamental Concrete INC | Arvada | CO | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| OOOut of the Animas LLC | Durango | CO | Nonmetallic Mineral Product Manufacturing327910 | — | ◇ UNVERIFIED |
| OGOwens-brockway Glass - Windsor #28 | Windsor | CO | Nonmetallic Mineral Product Manufacturing327213 | — | ◇ UNVERIFIED |
| PGParagon Granite & Marble | Longmont | CO | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| PPPeaks Precast LLC | Buena Vista | CO | Nonmetallic Mineral Product Manufacturing327390 | — | ◇ UNVERIFIED |
| PLPete Lien - Judge Orr Ready Mix Plant | Colorado Springs | CO | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| PLPete Lien & Sons - Plant #3 (drennan) | Colorado Springs | CO | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| PLPete Lien & Sons - St Barbara Ready Mix | Portable Source | CO | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
