# Relationship history for MSHA mine 1515618

Current hierarchy: **Dyer Steve → Tara John Coal Corp Inc → No 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Smith Earnest W & Coleman L → No 1; 1973-01-01 to 1991-04-03; source msha-controller-operator-history
- **operator_operates_mine:** Mc Clanahan & Justice Coal Corp → No 1; 1986-05-01 to 1988-03-27; source msha-controller-operator-history
- **controller_controls_mine:** Mc Clanahan Dewey → No 1; 1986-05-01 to 1988-03-27; source msha-controller-operator-history
- **controller_controls_operator:** Mc Clanahan Dewey → Mc Clanahan & Justice Coal Corp; 1986-05-01 to 1988-03-27; source msha-controller-operator-history
- **operator_operates_mine:** Coffee Cup Coal Company Inc → No 1; 1988-03-28 to 1988-06-02; source msha-controller-operator-history
- **controller_controls_operator:** Smith Earnest W & Coleman L → Coffee Cup Coal Company Inc; 1988-03-28 to 1988-06-02; source msha-controller-operator-history
- **operator_operates_mine:** Tara John Coal Corp Inc → No 1; 1988-06-03 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dyer Steve → No 1; 1988-06-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dyer Steve → Tara John Coal Corp Inc; 1988-06-03 to current/open; source msha-controller-operator-history