# Relationship history for MSHA mine 1516524

Current hierarchy: **Williams Darrell → April D Coal Company Inc → #2**

- 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:** Inspiration Resources Corporation → #2; 1982-02-03 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dotson Joy Ann → #2; 1988-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Five Star Mining Inc → #2; 1988-11-01 to 1989-09-14; source msha-controller-operator-history
- **controller_controls_operator:** Dotson Joy Ann → Five Star Mining Inc; 1988-11-01 to 1989-09-14; source msha-controller-operator-history
- **operator_operates_mine:** Spewing Branch Coal Corp → #2; 1989-09-15 to 1990-03-26; source msha-controller-operator-history
- **controller_controls_mine:** Hall John L → #2; 1989-09-15 to 1990-03-26; source msha-controller-operator-history
- **controller_controls_operator:** Hall John L → Spewing Branch Coal Corp; 1989-09-15 to 1990-03-26; source msha-controller-operator-history
- **operator_operates_mine:** Wheelwright Mining Inc → #2; 1990-03-27 to 1994-02-03; source msha-controller-operator-history
- **controller_controls_operator:** Inspiration Resources Corporation → Wheelwright Mining Inc; 1990-03-27 to 1994-02-03; source msha-controller-operator-history
- **controller_controls_mine:** Williams Darrell → #2; 1993-11-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** April D Coal Company Inc → #2; 1994-02-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Williams Darrell → April D Coal Company Inc; 1994-02-04 to current/open; source msha-controller-operator-history