# Relationship history for MSHA mine 1515814

Current hierarchy: **Haywood John → Two B Inc → Mine #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:** Haywood John → Mine #2; 1986-10-07 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Tenacious Mining Company Inc → Mine #2; 1986-11-01 to 1987-07-28; source msha-controller-operator-history
- **controller_controls_mine:** Caudill Emery → Mine #2; 1986-11-01 to 1987-07-28; source msha-controller-operator-history
- **controller_controls_operator:** Caudill Emery → Tenacious Mining Company Inc; 1986-11-01 to 1987-07-28; source msha-controller-operator-history
- **operator_operates_mine:** Two B Inc → Mine #2; 1987-07-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Haywood John → Two B Inc; 1987-07-29 to current/open; source msha-controller-operator-history