# Relationship history for MSHA mine 3304238

Current hierarchy: **John  Nicolozakes → E. K. Development Co., Inc. → Buckeyeville**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Dennis  Zaccagnini et al → Buckeyeville; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Fairpoint Coal Company → Buckeyeville; 1991-07-01 to 1991-08-26; source msha-controller-operator-history
- **controller_controls_operator:** Dennis  Zaccagnini et al → Fairpoint Coal Company; 1991-07-01 to 1991-08-26; source msha-controller-operator-history
- **operator_operates_mine:** Northshore Coal Inc → Buckeyeville; 1991-08-27 to 2001-06-27; source msha-controller-operator-history
- **controller_controls_mine:** Charles  Dawson → Buckeyeville; 1991-08-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Charles  Dawson → Northshore Coal Inc; 1991-08-27 to 2001-06-27; source msha-controller-operator-history
- **controller_controls_mine:** John  Nicolozakes → Buckeyeville; 1997-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** E. K. Development Co., Inc. → Buckeyeville; 2001-06-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John  Nicolozakes → E. K. Development Co., Inc.; 2001-06-28 to current/open; source msha-controller-operator-history