# Relationship history for MSHA mine 1515811

Current hierarchy: **Huffman James → Madco Coal Company → Madco Coal #1**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Daniel Roger D → Madco Coal #1; 1982-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mingo Coal Company Inc → Madco Coal #1; 1986-11-01 to 1987-12-16; source msha-controller-operator-history
- **controller_controls_operator:** Daniel Roger D → Mingo Coal Company Inc; 1986-11-01 to 1987-12-16; source msha-controller-operator-history
- **operator_operates_mine:** Jellico Creek Mining → Madco Coal #1; 1987-12-17 to 1989-10-15; source msha-controller-operator-history
- **controller_controls_mine:** Wells Dennis → Madco Coal #1; 1987-12-17 to 1989-10-15; source msha-controller-operator-history
- **controller_controls_operator:** Wells Dennis → Jellico Creek Mining; 1987-12-17 to 1989-10-15; source msha-controller-operator-history
- **operator_operates_mine:** Madco Coal Company → Madco Coal #1; 1989-10-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Huffman James → Madco Coal #1; 1989-10-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Huffman James → Madco Coal Company; 1989-10-16 to current/open; source msha-controller-operator-history