# Relationship history for MSHA mine 4001300

Current hierarchy: **Appleby Edd → Highcliff Coal Company Inc → No 1 Tipple**

- 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:** Appalachian Contracting Company → No 1 Tipple; 1950-01-01 to 1976-12-13; source msha-controller-operator-history
- **controller_controls_mine:** Kaneb Services Inc → No 1 Tipple; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kaneb Services Inc → Appalachian Contracting Company; 1950-01-01 to 1976-12-13; source msha-controller-operator-history
- **operator_operates_mine:** Doca Coal Company → No 1 Tipple; 1976-12-14 to 1977-06-20; source msha-controller-operator-history
- **controller_controls_mine:** Felts Carl L → No 1 Tipple; 1976-12-14 to 1977-06-20; source msha-controller-operator-history
- **controller_controls_operator:** Felts Carl L → Doca Coal Company; 1976-12-14 to 1977-06-20; source msha-controller-operator-history
- **operator_operates_mine:** Highcliff Coal Company Inc → No 1 Tipple; 1977-06-21 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Appleby Edd → No 1 Tipple; 1977-06-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Appleby Edd → Highcliff Coal Company Inc; 1977-06-21 to current/open; source msha-controller-operator-history