# Relationship history for MSHA mine 1517071

Current hierarchy: **Timothy P  Smith → Magic Coal Company → Magic Coal Company**

- 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:** Magic Coal Company → Magic Coal Company; 1991-05-01 to 2001-06-24; source msha-controller-operator-history
- **controller_controls_mine:** William D  Donan → Magic Coal Company; 1991-05-01 to 2001-06-24; source msha-controller-operator-history
- **controller_controls_operator:** William D  Donan → Magic Coal Company; 1991-05-01 to 2001-06-24; source msha-controller-operator-history
- **operator_operates_mine:** Magic Coal Company → Magic Coal Company; 2001-06-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jack W Whitfield → Magic Coal Company; 2001-06-25 to 2001-12-13; source msha-controller-operator-history
- **controller_controls_operator:** Jack W Whitfield → Magic Coal Company; 2001-06-25 to 2001-12-13; source msha-controller-operator-history
- **controller_controls_mine:** Timothy P  Smith → Magic Coal Company; 2001-12-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Timothy P  Smith → Magic Coal Company; 2001-12-14 to current/open; source msha-controller-operator-history