# Relationship history for MSHA mine 3304509

Current hierarchy: **J Clifford  Forrest III → Rosebud Mining Company → Tusky**

- 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:** J Clifford  Forrest III → Tusky; 1979-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Tusky Coal, LLC → Tusky; 2002-08-20 to 2005-06-22; source msha-controller-operator-history
- **controller_controls_mine:** Holmes Limestone → Tusky; 2002-08-20 to 2003-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Holmes Limestone → Tusky Coal, LLC; 2002-08-20 to 2003-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Charles C  Ungurean → Tusky; 2004-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Charles C  Ungurean → Tusky Coal, LLC; 2004-01-01 to 2005-06-22; source msha-controller-operator-history
- **operator_operates_mine:** Rosebud Mining Company → Tusky; 2005-06-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** J Clifford  Forrest III → Rosebud Mining Company; 2005-06-23 to current/open; source msha-controller-operator-history