# Relationship history for MSHA mine 1515670

Current hierarchy: **Tackett Jimmy W → Midnight Coal Corp → #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:** Crace Paris → #1; 1986-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Waller-N-Gom Inc → #1; 1986-06-01 to 1986-10-08; source msha-controller-operator-history
- **controller_controls_mine:** Billy M  Ward → #1; 1986-06-01 to 1986-10-08; source msha-controller-operator-history
- **controller_controls_operator:** Billy M  Ward → Waller-N-Gom Inc; 1986-06-01 to 1986-10-08; source msha-controller-operator-history
- **operator_operates_mine:** Energy Valley Inc → #1; 1986-10-09 to 1987-03-03; source msha-controller-operator-history
- **controller_controls_operator:** Crace Paris → Energy Valley Inc; 1986-10-09 to 1987-03-03; source msha-controller-operator-history
- **operator_operates_mine:** Mayo Resources Inc → #1; 1987-03-04 to 1992-09-27; source msha-controller-operator-history
- **controller_controls_mine:** James H  Booth et al → #1; 1987-03-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James H  Booth et al → Mayo Resources Inc; 1987-03-04 to 1992-09-27; source msha-controller-operator-history
- **operator_operates_mine:** Midnight Coal Corp → #1; 1992-09-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Tackett Jimmy W → #1; 1992-09-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tackett Jimmy W → Midnight Coal Corp; 1992-09-28 to current/open; source msha-controller-operator-history