All 22 drilling companies that have filed a well log in Jefferson County in the last ten years, 17 of them in the last five, ranked by recent work.
| Company | Last 5 yrs | Last 10 yrs | All time | Latest | First on file |
|---|---|---|---|---|---|
| H & L Drilling Inc | 105 | 225 | 1,106 | 2026 | 1969 |
| A-10 Drilling | 94 | 204 | 340 | 2026 | 2006 |
| Okeefe Drilling Co | 70 | 98 | 685 | 2026 | 1885 |
| Lindsay Drilling Co Inc | 58 | 119 | 1,349 | 2026 | 1930 |
| Western Water Wells | 57 | 100 | 100 | 2026 | 2018 |
| Red Tiger Drilling | 46 | 72 | 141 | 2026 | 1996 |
| Aaaa Water Well Drilling Inc | 33 | 53 | 69 | 2025 | 2006 |
| Ak Drilling Inc | 28 | 46 | 88 | 2026 | 1999 |
| Van Dyken Drilling Inc | 7 | 11 | 59 | 2025 | 1941 |
| Old Town Drilling | 7 | 7 | 7 | 2026 | 2023 |
| Vidic Drilling Inc | 7 | 7 | 7 | 2026 | 2024 |
| Graham Drilling Inc | 6 | 25 | 110 | 2025 | 1989 |
| Excel Pump And Well Inc. | 4 | 4 | 4 | 2023 | 2022 |
| Potts Drilling Inc | 2 | 6 | 44 | 2025 | 1967 |
| Bridger Drilling Inc | 1 | 2 | 8 | 2021 | 2004 |
| Graham Drilling & Pumps | 1 | 1 | 1 | 2026 | 2026 |
| Eagle Drilling And Pump Service | 1 | 1 | 1 | 2025 | 2025 |
| Mt Dept Of Transportation | 0 | 9 | 248 | 2017 | 1981 |
| Montana Highway Dept. | 0 | 8 | 8 | 2018 | 2018 |
| Dynamite Drilling | 0 | 5 | 184 | 2018 | 1979 |
| Parsons Drilling | 0 | 2 | 33 | 2017 | 2001 |
| Kevin Haggerty Drilling Inc | 0 | 1 | 13 | 2017 | 2004 |
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 Jefferson County: Montana Water Report.
Clancy Rader Creek Jefferson City Cardwell Whitehall Elkhorn Boulder Basin
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