| 1 | Kunau Drilling LLC | 1,498 | 6,172 | 7,197 |
| 2 | Hamacher Well Works Inc. | 722 | 4,587 | 10,447 |
| 3 | Can-America Drilling, Inc. | 209 | 2,499 | 5,159 |
| 4 | Hier Drilling Co. Inc. | 28 | 203 | 9,664 |
| 5 | Winegar Well Service | 28 | 29 | 169 |
| 6 | Black Mountain Drilling | 18 | 27 | 996 |
| 7 | Dallas D. Werner | 17 | 30 | 437 |
| 8 | Vine Laboratories, Inc. | 14 | 78 | 167 |
| 9 | Hydro Resources | 14 | 25 | 307 |
| 10 | Black Mountain Enterprises LLC | 10 | 279 | 3,016 |
| 11 | Dmw Well & Pump Service | 9 | 9 | 174 |
| 12 | Kelley Dewatering And Construction Company | 8 | 13 | 538 |
| 13 | Layne, Christensen Co. | 6 | 201 | 1,963 |
| 14 | Cascade Drilling, LP | 6 | 9 | 70 |
| 15 | Layne A Granite Company | 6 | 8 | 35 |
| 16 | Authentic Drilling | 4 | 8 | 281 |
| 17 | Trinity Water Solutions, LLC | 4 | 4 | 61 |
| 18 | Young's Drilling & Pump Services | 3 | 26 | 1,840 |
| 19 | Schaal Drilling Co. | 3 | 5 | 2,203 |
| 20 | Arkansas Valley Drilling | 2 | 14 | 3,041 |
| 21 | Pearson Drilling & Pump Service | 2 | 9 | 491 |
| 22 | Crandall Drilling & Pump Service | 1 | 2 | 3,578 |
| 23 | Twin Peaks Drilling | 1 | 1 | 475 |
| 24 | Mccoy Water Well/Precision Drilling | 1 | 1 | 88 |
| 25 | Holden & Holden | 1 | 1 | 1,000 |
| 26 | Western American Drilling Inc. | 1 | 1 | 434 |
| 27 | Fletcher Drilling | — | 3,017 | 3,523 |
| 28 | M & B Drilling Co. | — | 2,223 | 2,291 |
| 29 | V. J. Stewart Drilling Co. | — | 1,013 | 1,156 |
| 30 | W. V. Harding & Sons | — | 963 | 1,161 |
| 31 | Paul Fletcher & Sons Inc. | — | 892 | 965 |
| 32 | Townley Drilling | — | 562 | 755 |
| 33 | Kunau Drilling & Excavation | — | 354 | 465 |
| 34 | Joe Coniff Elec. Co. | — | 158 | 179 |
| 35 | O.k. Hamacher Well Works | — | 151 | 393 |
| 36 | Woods Drilling Inc. | — | 142 | 3,293 |
| 37 | Inter Mountain Drilling Ltd. | — | 104 | 1,946 |
| 38 | Mitchell Drilling Co. | — | 75 | 793 |
| 39 | Gary L. Hamacher | — | 63 | 95 |
| 40 | Country Well & Pump Co. | — | 60 | 75 |
| 41 | Reaksecker Well Drilling | — | 58 | 1,435 |
| 42 | Colorado Water Well Pump Service & Supply Inc. | — | 53 | 113 |
| 43 | Paul Fletcher Drilling Co. | — | 52 | 179 |
| 44 | Ground Exploration LLC | — | 47 | 1,454 |
| 45 | Crawford Well & Pump Works | — | 40 | 45 |
| 46 | High Plains Drilling | — | 36 | 688 |
| 47 | Henkle Drillng & Supply Co.inc | — | 36 | 384 |
| 48 | Layne Western Company Inc. | — | 34 | 659 |
| 49 | Eastwood Drilling | — | 32 | 1,739 |
| 50 | Rmpd, Ltd Dba Rocky Mtn Pump & Drilling | — | 32 | 1,204 |
| 51 | Virginia Drilling Co. Inc. | — | 31 | 2,167 |
| 52 | Eugene Wheeler | — | 25 | 334 |
| 53 | B & B Well Service | — | 25 | 28 |
| 54 | Marc Haes | — | 23 | 80 |
| 55 | Drilling Engineers Inc. | — | 22 | 553 |
| 56 | Rocky Mountain Pump & Drilling | — | 22 | 508 |
| 57 | Vista Geoscience | — | 22 | 72 |
| 58 | Tyra Well Drilling | — | 22 | 25 |
| 59 | Pikes Peak Drlg & Pump Corp. | — | 21 | 26 |
| 60 | Crandall Drlg. & Trenching Inc. | — | 19 | 325 |
| 61 | John Large | — | 15 | 26 |
| 62 | Bernard Drilling Co. | — | 13 | 696 |
| 63 | Hackworth Drilling Inc. | — | 13 | 188 |
| 64 | Parker Drilling/Pump Service Inc. | — | 10 | 2,530 |
| 65 | Lesh Drilling Inc. | — | 10 | 2,470 |
| 66 | Boyles Bros. Drilling Co. | — | 10 | 1,088 |
| 67 | Hasz Energy & Development Co. | — | 10 | 329 |
| 68 | H A Crandall | — | 8 | 436 |
| 69 | Ram Drilling Inc. | — | 7 | 60 |
| 70 | C. R. Smith Drilling | — | 6 | 2,039 |
| 71 | Don Eastwood Drilling Inc. | — | 6 | 1,672 |
| 72 | Hoffman | — | 6 | 1,335 |
| 73 | Roger Schocke Well Drlg. Inc. | — | 6 | 1,230 |
| 74 | Glenn Getman | — | 6 | 33 |
| 75 | Living Water Systems Inc. | — | 5 | 3,572 |
| 76 | Glenn A. Clement | — | 5 | 1,297 |
| 77 | Whitewater Drilling Inc. | — | 5 | 1,277 |
| 78 | Timberline Drilling | — | 5 | 295 |
| 79 | DL Drilling LLC | — | 5 | 237 |
| 80 | Colorado Drilling Company | — | 5 | 98 |
| 81 | J. A. Price & Co. | — | 5 | 29 |
| 82 | H B Pixley | — | 5 | 25 |
| 83 | Canfield Drilling Company | — | 4 | 3,439 |
| 84 | Terracon Consultants Inc. | — | 4 | 391 |
| 85 | Alpine Drilling Service | — | 4 | 965 |
| 86 | Worosello Drilling Inc. | — | 4 | 945 |
| 87 | Don Stewart & Son Drilling | — | 4 | 654 |
| 88 | Mark Reeves | — | 4 | 502 |
| 89 | Ray Smischny & Son Inc. | — | 4 | 53 |
| 90 | James Drilling Company | — | 3 | 6,736 |
| 91 | Arrow Drilling | — | 3 | 2,709 |
| 92 | Alpine Drilling & Pump Co. | — | 3 | 980 |
| 93 | Mccoy Drilling Inc. | — | 3 | 887 |
| 94 | Oliver Well Works | — | 3 | 465 |
| 95 | Robert A. Jackson | — | 3 | 284 |
| 96 | Ormsbee Development Co. | — | 3 | 120 |
| 97 | Western Well Drilling Inc. | — | 3 | 113 |
| 98 | Moore's Well Drilling | — | 3 | 45 |
| 99 | Ray L Smischny | — | 3 | 44 |
| 100 | Mcmillan Well Works Inc. | — | 3 | 38 |
| 101 | Valley Pump Company | — | 2 | 2,578 |
| 102 | Finney Drilling | — | 2 | 1,283 |
| 103 | Walton, | — | 2 | 2,156 |
| 104 | Stewart Drilling Co. | — | 2 | 2,007 |
| 105 | Irrigation Engineering & Supp. | — | 2 | 1,027 |
| 106 | Mark A. Huffington | — | 2 | 272 |
| 107 | Don W. Thompson Drillng & Pump | — | 2 | 191 |
| 108 | Olin J Thompson | — | 2 | 183 |
| 109 | Foster Drilling | — | 2 | 150 |
| 110 | Johnson Brothers | — | 2 | 112 |
| 111 | C. W. Grimshaw Drilling Co. | — | 2 | 97 |
| 112 | J Dixon | — | 2 | 82 |
| 113 | Steele Drilling Company | — | 2 | 26 |
| 114 | High Desert Irrigation LLC | — | 1 | 1,942 |
| 115 | Dak Drilling LLC | — | 1 | 1,696 |
| 116 | Quality Well & Pump LLC | — | 1 | 702 |
| 117 | Environmental Works Inc. | — | 1 | 50 |
| 118 | Glover's Drilling | — | 1 | 913 |
| 119 | Rocky Mountain Waterworks LLC | — | 1 | 893 |
| 120 | Ground Water Systems Inc. | — | 1 | 3,481 |
| 121 | Ernie's Mountain Drilling Inc. | — | 1 | 3,118 |
| 122 | Wellstone Industries Dba Twiss & Wilson Drilling Inc. | — | 1 | 2,730 |
| 123 | Mcpherson Drilling Company | — | 1 | 2,664 |
| 124 | Aspen Drilling Company Inc. | — | 1 | 2,648 |
| 125 | Leslie George Canfield | — | 1 | 2,170 |
| 126 | Bill Kissner Drilling Inc. | — | 1 | 1,313 |
| 127 | Mountain Drilling Co. | — | 1 | 487 |
| 128 | Holland/Mcmullen Water Well Drilling | — | 1 | 427 |
| 129 | D W Spencer | — | 1 | 417 |
| 130 | Timber Line Drilling | — | 1 | 415 |
| 131 | Crandall's Look-N-Good Drilling | — | 1 | 292 |
| 132 | C R Koogle | — | 1 | 257 |
| 133 | Darrell L. Sorensen | — | 1 | 226 |
| 134 | A. E. Biggs & Son | — | 1 | 225 |
| 135 | Fred Wratislaw | — | 1 | 217 |
| 136 | Gritz Drilling And Supply | — | 1 | 197 |
| 137 | Lang Equipment, LLC | — | 1 | 190 |
| 138 | MA-Bel Drilling | — | 1 | 187 |
| 139 | Norris Brothers | — | 1 | 183 |
| 140 | Harry D Christensen | — | 1 | 173 |
| 141 | Lorraine Pearson | — | 1 | 167 |
| 142 | L. E. Lewis Drilling Co. | — | 1 | 123 |
| 143 | Rudolph Pump & Equipment Co. | — | 1 | 116 |
| 144 | Harry D. Folger & Son | — | 1 | 109 |
| 145 | Evergreen Drilling | — | 1 | 82 |
| 146 | Donald Purdue | — | 1 | 78 |
| 147 | Clibon Drilling Co. | — | 1 | 77 |
| 148 | Bert D Downey | — | 1 | 74 |
| 149 | Dorris Drilling Co. | — | 1 | 70 |
| 150 | Camp Drilling Co. | — | 1 | 66 |
| 151 | Joe Felton & Son Drilling | — | 1 | 43 |
| 152 | Carl M Minister | — | 1 | 41 |
| 153 | Norman Hill Drilling Co. | — | 1 | 39 |
| 154 | Harold Thurman | — | 1 | 38 |
| 155 | Crandall Bros. | — | 1 | 37 |
| 156 | E R Goodrich | — | 1 | 34 |
| 157 | Atlas Drilling Company | — | 1 | 34 |
| 158 | Jim Keaton Drilling Co. | — | 1 | 34 |