| 1 | Allen Drilling & Excavating Co., Inc. | 700 | 3,616 | 3,788 |
| 2 | Black Mountain Drilling | 179 | 280 | 996 |
| 3 | Asap Well Drilling Inc. | 169 | 398 | 1,109 |
| 4 | Holland And Sons Water Well Drilling | 160 | 198 | 275 |
| 5 | Allen Drilling Inc. | 130 | 215 | 222 |
| 6 | James Drilling Company | 104 | 804 | 6,736 |
| 7 | Holland/Mcmullen Water Well Drilling | 65 | 286 | 427 |
| 8 | Living Water Systems Inc. | 59 | 1,430 | 3,572 |
| 9 | Authentic Drilling | 27 | 34 | 281 |
| 10 | Black Mountain Enterprises LLC | 25 | 818 | 3,016 |
| 11 | Finney Drilling | 20 | 37 | 1,283 |
| 12 | Arrow Drilling | 18 | 83 | 2,709 |
| 13 | Golden Eagle Drilling Corporation | 16 | 126 | 3,981 |
| 14 | Layne, Christensen Co. | 4 | 10 | 1,963 |
| 15 | Rmpd, Ltd Dba Rocky Mtn Pump & Drilling | 3 | 415 | 1,204 |
| 16 | Aspen Drilling Company Inc. | 3 | 399 | 2,648 |
| 17 | Young's Drilling & Pump Services | 3 | 22 | 1,840 |
| 18 | American Drilling Service | 3 | 15 | 3,555 |
| 19 | Arkansas Valley Drilling | 3 | 15 | 3,041 |
| 20 | Twin Peaks Drilling | 3 | 9 | 475 |
| 21 | Crandall Drilling & Pump Service | 3 | 3 | 3,578 |
| 22 | Mccoy Water Well/Precision Drilling | 2 | 7 | 88 |
| 23 | Winegar Well Service | 2 | 3 | 169 |
| 24 | Whitewater Drilling Inc. | 1 | 834 | 1,277 |
| 25 | Taylor Exploration Co. | 1 | 12 | 51 |
| 26 | Can-America Drilling, Inc. | 1 | 10 | 5,159 |
| 27 | Hier Drilling Co. Inc. | 1 | 5 | 9,664 |
| 28 | Nwp Drilling & Consulting | 1 | 3 | 634 |
| 29 | Dmw Well & Pump Service | 1 | 3 | 174 |
| 30 | Dallas D. Werner | 1 | 3 | 437 |
| 31 | Kelley Dewatering And Construction Company | 1 | 1 | 538 |
| 32 | Stan's Drilling | — | 912 | 1,365 |
| 33 | Ernie's Mountain Drilling Inc. | — | 774 | 3,118 |
| 34 | Inter Mountain Drilling Ltd. | — | 502 | 1,946 |
| 35 | Virginia Drilling Co. Inc. | — | 420 | 2,167 |
| 36 | Woods Drilling Inc. | — | 402 | 3,293 |
| 37 | Five Star Inc. | — | 336 | 632 |
| 38 | Walton, | — | 187 | 2,156 |
| 39 | Schmitt Drilling Co. | — | 185 | 621 |
| 40 | Werner Drilling & Excavating | — | 176 | 625 |
| 41 | Rocky Mountain Pump & Drilling | — | 160 | 508 |
| 42 | Aragon Drilling Co. | — | 145 | 205 |
| 43 | Living Water Well & Pump Inc. | — | 143 | 414 |
| 44 | James Storm | — | 122 | 1,117 |
| 45 | Bernard Storm | — | 87 | 536 |
| 46 | Timberline Drilling | — | 82 | 295 |
| 47 | Bernard Drilling Co. | — | 78 | 696 |
| 48 | Strain Excavating | — | 74 | 194 |
| 49 | Buena Vista Drilling | — | 64 | 1,367 |
| 50 | Air West Drilling | — | 63 | 237 |
| 51 | Domestic Water Consultants Inc. | — | 56 | 129 |
| 52 | W. V. Harding & Sons | — | 48 | 1,161 |
| 53 | Alpine Drilling & Pump Co. | — | 46 | 980 |
| 54 | Steve Shelton Drilling, Inc. | — | 39 | 1,160 |
| 55 | Alfred J Clements | — | 39 | 59 |
| 56 | Abco Drilling Inc. | — | 36 | 37 |
| 57 | Kerr & Sons | — | 35 | 94 |
| 58 | Fletcher Drilling | — | 32 | 3,523 |
| 59 | Rupp Drilling Co., Inc. | — | 28 | 226 |
| 60 | Glen Cole | — | 28 | 84 |
| 61 | William L Eden | — | 24 | 58 |
| 62 | Alpine Drilling Service | — | 23 | 965 |
| 63 | Ram Drilling Inc. | — | 22 | 60 |
| 64 | Shaffers Crossing Drilling | — | 16 | 32 |
| 65 | Mcpherson Drilling Company | — | 15 | 2,664 |
| 66 | Mark A. Huffington | — | 11 | 272 |
| 67 | Shelton Drilling Corporation | — | 10 | 6,161 |
| 68 | Moody Drilling | — | 10 | 368 |
| 69 | Gary M. Vallas | — | 10 | 37 |
| 70 | Bomareto Pump And Equipment Company LLC | — | 8 | 234 |
| 71 | Reaksecker Well Drilling | — | 7 | 1,435 |
| 72 | Paul Fletcher Drilling Co. | — | 7 | 179 |
| 73 | Foster Drilling | — | 7 | 150 |
| 74 | Ray L Smischny | — | 7 | 44 |
| 75 | C. R. Smith Drilling | — | 6 | 2,039 |
| 76 | Stewart Drilling Co. | — | 6 | 2,007 |
| 77 | John's Drilling Inc. | — | 6 | 1,460 |
| 78 | M & M Backhoe Service | — | 6 | 497 |
| 79 | Paul David Huff | — | 6 | 71 |
| 80 | Ray Smischny & Son Inc. | — | 6 | 53 |
| 81 | Norris & Sons | — | 5 | 1,573 |
| 82 | Twin Lakes Drilling Co. | — | 5 | 829 |
| 83 | Grabe & Co. | — | 5 | 257 |
| 84 | E F Holman | — | 5 | 97 |
| 85 | Sidney Lilly D. | — | 5 | 63 |
| 86 | Eastwood Drilling | — | 4 | 1,739 |
| 87 | Rumberg Inc. | — | 4 | 54 |
| 88 | Steele Drilling Company | — | 4 | 26 |
| 89 | Kunau Drilling LLC | — | 3 | 7,197 |
| 90 | Mitchell Drilling Co. | — | 3 | 793 |
| 91 | Harry D Christensen | — | 3 | 173 |
| 92 | Carlyle's Well Drilling Serv. | — | 3 | 127 |
| 93 | Rocky Mountain Drilling Co. | — | 3 | 47 |
| 94 | Charles L Grabler | — | 3 | 32 |
| 95 | Ingram Drilling Inc. | — | 2 | 5,076 |
| 96 | Burk Drilling Inc. | — | 2 | 625 |
| 97 | Holden & Holden | — | 2 | 1,000 |
| 98 | Ground Water Systems Inc. | — | 2 | 3,481 |
| 99 | M & B Drilling Co. | — | 2 | 2,291 |
| 100 | Leslie George Canfield | — | 2 | 2,170 |
| 101 | Don Eastwood Drilling Inc. | — | 2 | 1,672 |
| 102 | Ground Exploration LLC | — | 2 | 1,454 |
| 103 | V. J. Stewart Drilling Co. | — | 2 | 1,156 |
| 104 | J & J Drilling Inc. | — | 2 | 401 |
| 105 | Henkle Drillng & Supply Co.inc | — | 2 | 384 |
| 106 | Reeves Drilling Inc. | — | 2 | 354 |
| 107 | Joe's Drilling Co. | — | 2 | 131 |
| 108 | Arvada Pump Co. Inc. | — | 2 | 116 |
| 109 | Kenyon Drilling/Kenyon Motor | — | 2 | 90 |
| 110 | Donald Purdue | — | 2 | 78 |
| 111 | L E Bundy | — | 2 | 67 |
| 112 | Alcro Inc. | — | 2 | 52 |
| 113 | Crawford Well & Pump Works | — | 2 | 45 |
| 114 | Moore's Well Drilling | — | 2 | 45 |
| 115 | Walter J Charfield | — | 2 | 43 |
| 116 | Curtis Johnson Company | — | 2 | 35 |
| 117 | Norman Cline Well Drilling | — | 2 | 26 |
| 118 | Hamacher Well Works Inc. | — | 1 | 10,447 |
| 119 | Wildcat Drilling & Pump, Inc. | — | 1 | 1,254 |
| 120 | The Connector LLC | — | 1 | 451 |
| 121 | Nequette Drilling | — | 1 | 2,191 |
| 122 | Boyles Bros. Drilling Co. | — | 1 | 1,088 |
| 123 | Irrigation Engineering & Supp. | — | 1 | 1,027 |
| 124 | Worosello Drilling Inc. | — | 1 | 945 |
| 125 | Mccoy Drilling Inc. | — | 1 | 887 |
| 126 | Layne Western Company Inc. | — | 1 | 659 |
| 127 | Pro Well & Pump | — | 1 | 615 |
| 128 | Kunau Drilling & Excavation | — | 1 | 465 |
| 129 | Adams Water Well Drilling | — | 1 | 433 |
| 130 | Ark Valley Pump & Supply | — | 1 | 348 |
| 131 | Wiggins Irrigation & Agri Serv | — | 1 | 296 |
| 132 | Crandall's Look-N-Good Drilling | — | 1 | 292 |
| 133 | Finney & Son | — | 1 | 286 |
| 134 | Adams City Mfg. Co. | — | 1 | 254 |
| 135 | Mineral Exploration Drilling | — | 1 | 246 |
| 136 | Hackworth Drilling Inc. | — | 1 | 188 |
| 137 | Joe Coniff Elec. Co. | — | 1 | 179 |
| 138 | Western Sprinklers Inc. | — | 1 | 148 |
| 139 | S. E. Camp Drilling | — | 1 | 144 |
| 140 | Gregory A Rife | — | 1 | 138 |
| 141 | Laplata Machine Supply Inc. | — | 1 | 127 |
| 142 | Gale Martin | — | 1 | 120 |
| 143 | Precision Drilling | — | 1 | 115 |
| 144 | Allison Drilling Co. Inc. | — | 1 | 99 |
| 145 | Downey & Jaramio Well Drlg. | — | 1 | 89 |
| 146 | Thompson Drilling Co. | — | 1 | 85 |
| 147 | Evergreen Drilling | — | 1 | 82 |
| 148 | Livingston & Wilson | — | 1 | 59 |
| 149 | Clover Petroleum Co. | — | 1 | 49 |
| 150 | Clibon Well Drilling Co. | — | 1 | 47 |
| 151 | Hill Depriest | — | 1 | 46 |
| 152 | Spencer Drilling | — | 1 | 46 |
| 153 | Golden Drilling Inc. | — | 1 | 40 |
| 154 | Glenn E Yeater | — | 1 | 34 |
| 155 | Jim Keaton Drilling Co. | — | 1 | 34 |
| 156 | Plains Drilling Co. | — | 1 | 30 |
| 157 | B & B Well Service | — | 1 | 28 |