| 1 | Steve Kaser | 610 | 651 | 1,241 |
| 2 | Glacier Drilling & Dewatering | 503 | 503 | 1,449 |
| 3 | Groundwater Protection Service LLC | 168 | 168 | 242 |
| 4 | Skyles Drilling Inc. | 80 | 598 | 5,397 |
| 5 | K Consulting | 38 | 38 | 88 |
| 6 | Olsen Well Drilling & Pump | 37 | 37 | 177 |
| 7 | Dbm Contractors Inc. | 32 | 32 | 32 |
| 8 | Alpine Resources LLC | 27 | 28 | 655 |
| 9 | Cascade Drilling LP | 26 | 150 | 325 |
| 10 | All Seasons Well Drilling | 26 | 26 | 525 |
| 11 | Robert D Miller Consulting | 23 | 45 | 92 |
| 12 | A M Jannsen Well Drilling Co. Inc. | 15 | 207 | 1,744 |
| 13 | Malcolm Drilling Co. Inc. | 15 | 26 | 945 |
| 14 | Hansen Drilling Co. Inc. | 14 | 206 | 378 |
| 15 | Holocene Drilling Inc. | 14 | 146 | 146 |
| 16 | Schneider Water Services | 14 | 14 | 164 |
| 17 | Pli Systems | 14 | 14 | 149 |
| 18 | Holt Services Inc. | 11 | 11 | 70 |
| 19 | Mcmullen Drilling Corp. | 10 | 96 | 1,329 |
| 20 | Stratus Corp | 10 | 66 | 108 |
| 21 | A & P Pump Service LLC | 9 | 9 | 169 |
| 22 | Griffin Contract Dewatering LLC | 8 | 8 | 373 |
| 23 | Alpine Resourcs LLC | 7 | 7 | 78 |
| 24 | Ted Pulliam Well Drilling | 6 | 174 | 931 |
| 25 | Mcmullen Well Drilling Corp | 6 | 6 | 191 |
| 26 | Arrow Drilling | 5 | 10 | 1,522 |
| 27 | Westerberg Drilling | 4 | 16 | 1,937 |
| 28 | Youngberg Pump & Well Drilling | 4 | 14 | 920 |
| 29 | Rick Wallaert Well Drilling | 4 | 5 | 109 |
| 30 | Younberg Pump & Well Drilling LLC | 4 | 4 | 46 |
| 31 | Jones Well Drilling Co. Inc. | 3 | 14 | 2,721 |
| 32 | M & M Well Drilling | 3 | 7 | 297 |
| 33 | Alpha Drilling | 3 | 3 | 92 |
| 34 | Jensen Drilling Co. | 2 | 27 | 408 |
| 35 | Blue Water Drilling Co. Inc. | 1 | 10 | 2,203 |
| 36 | Owrd Staff | 1 | 9 | 597 |
| 37 | Larry Evey Well Drilling | 1 | 5 | 873 |
| 38 | Mack Drilling Co. | 1 | 3 | 2,791 |
| 39 | Jeff Haboush Well Drilling | 1 | 2 | 406 |
| 40 | R Stadeli & Sons Well & Pump Inc. | 1 | 1 | 161 |
| 41 | Rodney C Erler | 1 | 1 | 84 |
| 42 | Gray Well Drilling Inc. | — | 557 | 795 |
| 43 | A M Jannsen Drilling | — | 260 | 2,026 |
| 44 | Don Feakin | — | 223 | 384 |
| 45 | Youngberg Drilling | — | 170 | 545 |
| 46 | R J Strasser Drilling Co. | — | 163 | 410 |
| 47 | Merwin 'bud' Mcmullen | — | 160 | 187 |
| 48 | Ralph Turner Drilling Co. | — | 128 | 647 |
| 49 | Larry A Gray | — | 126 | 126 |
| 50 | Haakon Bottner Drilling Co. | — | 105 | 317 |
| 51 | Turner Drilling Co. Inc. | — | 97 | 322 |
| 52 | Holt Drilling Inc. | — | 89 | 90 |
| 53 | Steinman Brothers Drilling Co. | — | 74 | 1,061 |
| 54 | Western Drilling Co. | — | 70 | 997 |
| 55 | Geo-Tech Explorations | — | 67 | 384 |
| 56 | Steinman Brothers | — | 65 | 1,193 |
| 57 | Barron & Strayer | — | 59 | 152 |
| 58 | Skyles Drilling & Supply | — | 56 | 1,222 |
| 59 | Turner Well Drilling | — | 53 | 436 |
| 60 | Keller Well Drilling Co. | — | 41 | 603 |
| 61 | Gregory Drilling Inc. | — | 36 | 41 |
| 62 | Mcinally Well Drilling | — | 36 | 196 |
| 63 | Western States Soil & Cons Inc. | — | 35 | 40 |
| 64 | American Well Drilling Inc. | — | 34 | 532 |
| 65 | Olsen Well Drilling Inc. | — | 32 | 203 |
| 66 | Calvin C Bram Well Drilling | — | 31 | 200 |
| 67 | Well ID Application | — | 30 | 2,794 |
| 68 | Schneider Equipment Co. | — | 27 | 470 |
| 69 | Kaufman Well Drilling | — | 27 | 27 |
| 70 | Gary Mitch Raley | — | 24 | 68 |
| 71 | S & M Drilling & Supply Inc. | — | 22 | 866 |
| 72 | Turner Water Well Drilling | — | 21 | 66 |
| 73 | Boart Longyear | — | 20 | 46 |
| 74 | Casey Jones Well Drilling | — | 18 | 5,361 |
| 75 | Swift Water Well Drilling Inc. | — | 18 | 156 |
| 76 | Brant Well Drilling | — | 18 | 153 |
| 77 | Exeter Water Well Drilling | — | 17 | 74 |
| 78 | A O Olsen Well Drilling | — | 16 | 85 |
| 79 | Staco Well Services | — | 15 | 324 |
| 80 | Lanz Well Drilling | — | 14 | 239 |
| 81 | D V Wyland & Co. Inc. | — | 14 | 197 |
| 82 | Boart Longyear E & I | — | 14 | 39 |
| 83 | Ross A Jannsen Well Drilling | — | 13 | 590 |
| 84 | Beck Well Drilling | — | 13 | 427 |
| 85 | Submersible Pump & Drilling Co. | — | 13 | 31 |
| 86 | Monders Inc. | — | 12 | 287 |
| 87 | Sippel Well Drilling Inc. | — | 11 | 2,102 |
| 88 | Prepared BY Owrd Staff | — | 9 | 1,283 |
| 89 | Land Owner | — | 8 | 1,454 |
| 90 | Stettler Supply Co. | — | 8 | 168 |
| 91 | Ron Robinson Well Drilling | — | 7 | 646 |
| 92 | G A Luttrell Well Drilling | — | 7 | 31 |
| 93 | A J Gaunt & Son | — | 6 | 562 |
| 94 | Grossen's Well Drilling | — | 5 | 354 |
| 95 | S & M Drilling | — | 5 | 34 |
| 96 | George Zent & Sons | — | 5 | 33 |
| 97 | Dickerson Well Drilling | — | 4 | 1,647 |
| 98 | Christensen Well Drilling Co. | — | 4 | 1,129 |
| 99 | Tacoma Pump & Drilling Co. Inc. | — | 4 | 377 |
| 100 | Anthony Well Drilling | — | 4 | 116 |
| 101 | O E Jannsen Drilling Co. | — | 4 | 72 |
| 102 | B & S Drilling Co. | — | 4 | 55 |
| 103 | Miracle Drilling Co. | — | 4 | 35 |
| 104 | Tualatin Valley Drilling Co. | — | 3 | 524 |
| 105 | West Coast Drilling | — | 2 | 474 |
| 106 | Bud Trussell Well Drilling | — | 2 | 472 |
| 107 | All Ways Drilling | — | 2 | 232 |
| 108 | Flores Well Drilling | — | 2 | 152 |
| 109 | Orvail Buckner Well Drilling | — | 2 | 146 |
| 110 | Dale Mcghee Well Drilling | — | 2 | 128 |
| 111 | Anthony Well Drilling & Pumps, Inc. | — | 2 | 87 |
| 112 | Gaarsland Drilling Co. | — | 2 | 85 |
| 113 | Person Pump & Well Drilling | — | 2 | 76 |
| 114 | Farrel Mcghee Well Drilling | — | 2 | 70 |
| 115 | Ross Jannsen Well Drilling | — | 2 | 60 |
| 116 | Borchers Drilling Inc. | — | 2 | 48 |
| 117 | Deceased/R. J. Strasser Drilling Co. | — | 2 | 38 |
| 118 | Brockett's Drilling Inc. | — | 2 | 33 |
| 119 | Hendrickson Well Drilling Inc. | — | 1 | 1,945 |
| 120 | Dale Mcghee & Sons Well Drilling | — | 1 | 228 |
| 121 | Willamette Drilling Co. | — | 1 | 3,018 |
| 122 | Eola Well Drilling | — | 1 | 341 |
| 123 | Ray Borchers Well Drilling | — | 1 | 315 |
| 124 | Bello Well Drilling | — | 1 | 292 |
| 125 | Murray Well Drilling | — | 1 | 150 |
| 126 | Art Mcmullen Drilling Corporation | — | 1 | 141 |
| 127 | Devlaeminck Well Drilling | — | 1 | 132 |
| 128 | Estacada Well Drilling | — | 1 | 117 |
| 129 | Dale Mcgee & Sons Well Drilling | — | 1 | 95 |
| 130 | John W Beck Well Drilling | — | 1 | 71 |
| 131 | D V Wyland Co. | — | 1 | 45 |
| 132 | Mosher Drilling Co. | — | 1 | 36 |