All 24 drilling companies that have filed a well log in Madison County in the last ten years, 19 of them in the last five, ranked by recent work.
| Company | Last 5 yrs | Last 10 yrs | All time | Latest | First on file |
|---|---|---|---|---|---|
| Graham Drilling Inc | 273 | 603 | 1,830 | 2025 | 1945 |
| Red Tiger Drilling | 118 | 167 | 411 | 2026 | 1989 |
| Potts Drilling Inc | 97 | 135 | 333 | 2026 | 1965 |
| Ak Drilling Inc | 39 | 65 | 87 | 2026 | 2000 |
| Okeefe Drilling Co | 35 | 66 | 652 | 2026 | 1963 |
| Old Town Drilling | 33 | 33 | 33 | 2026 | 2023 |
| Van Dyken Drilling Inc | 32 | 57 | 350 | 2026 | 1960 |
| Graham Drilling & Pumps | 28 | 28 | 28 | 2026 | 2025 |
| Excel Pump And Well Inc. | 28 | 28 | 28 | 2025 | 2021 |
| Western Water Wells | 23 | 30 | 30 | 2026 | 2020 |
| Diamond M Drilling Inc | 20 | 32 | 44 | 2025 | 1999 |
| Pioneer Technical Services Inc | 13 | 13 | 13 | 2025 | 2021 |
| Bridger Drilling Inc | 9 | 12 | 151 | 2023 | 1991 |
| Vidic Drilling Inc | 6 | 6 | 6 | 2026 | 2024 |
| Lindsay Drilling Co Inc | 4 | 13 | 104 | 2026 | 1966 |
| A-10 Drilling | 4 | 12 | 21 | 2023 | 2006 |
| Excel Drilling, Inc | 3 | 4 | 4 | 2021 | 2020 |
| Bertram Drilling Inc | 1 | 3 | 6 | 2024 | 2002 |
| Boland Drilling | 1 | 1 | 1 | 2023 | 2023 |
| Mt Dept Of Transportation | 0 | 36 | 139 | 2016 | 1996 |
| Montana Highway Dept. | 0 | 16 | 16 | 2019 | 2019 |
| Haz Tech Drilling Inc | 0 | 6 | 15 | 2018 | 2007 |
| Aaaa Water Well Drilling Inc | 0 | 2 | 2 | 2020 | 2020 |
| Parsons Drilling | 0 | 1 | 6 | 2019 | 2003 |
Source: MBMG Ground Water Information Center well logs. A count of public records, not a recommendation. How to check a driller. Depth and yield for Madison County: Montana Water Report.
Ennis Virginia City McAllister Mammoth Silver Star Harrison Norris Sheridan Pony Twin Bridges Alder
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