# Relationship history for MSHA mine 3608221

Current hierarchy: **Lucas Gary & Terrence L Kennedy → G S & T Coal Company → Primrose Slope**

- 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

- **operator_operates_mine:** R & S Coal Company → Primrose Slope; 1991-01-01 to 1998-06-18; source msha-controller-operator-history
- **controller_controls_mine:** Shoffler Rick → Primrose Slope; 1991-01-01 to 1998-06-18; source msha-controller-operator-history
- **controller_controls_operator:** Shoffler Rick → R & S Coal Company; 1991-01-01 to 1998-06-18; source msha-controller-operator-history
- **operator_operates_mine:** G S & T Coal Company → Primrose Slope; 1998-06-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lucas Gary & Terrence L Kennedy → Primrose Slope; 1998-06-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lucas Gary & Terrence L Kennedy → G S & T Coal Company; 1998-06-19 to current/open; source msha-controller-operator-history