# Relationship history for MSHA mine 1514639

Current hierarchy: **Patterson Charles → Krystal Coal Company → Krystal #3**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Partin Earl Et Al → Krystal #3; 1984-04-18 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Faith Coal Company → Krystal #3; 1984-05-01 to 1984-12-27; source msha-controller-operator-history
- **controller_controls_mine:** Jackson Calvin & George Payne → Krystal #3; 1984-05-01 to 1984-12-27; source msha-controller-operator-history
- **controller_controls_operator:** Jackson Calvin & George Payne → Faith Coal Company; 1984-05-01 to 1984-12-27; source msha-controller-operator-history
- **operator_operates_mine:** B & E Coal Company → Krystal #3; 1984-12-28 to 1987-03-18; source msha-controller-operator-history
- **controller_controls_operator:** Partin Earl Et Al → B & E Coal Company; 1984-12-28 to 1987-03-18; source msha-controller-operator-history
- **controller_controls_mine:** Patterson Charles Et Al → Krystal #3; 1986-11-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Krystal Coal Company → Krystal #3; 1987-03-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Patterson Charles Et Al → Krystal Coal Company; 1987-03-19 to current/open; source msha-controller-operator-history