# Relationship history for MSHA mine 1515432

Current hierarchy: **Patterson Daniel → Dan'S Coal Company → #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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Wormey Coal Company → #1; 1985-11-01 to 1987-05-07; source msha-controller-operator-history
- **controller_controls_mine:** Taylor Mike → #1; 1985-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Taylor Mike → Wormey Coal Company; 1985-11-01 to 1987-05-07; source msha-controller-operator-history
- **operator_operates_mine:** B & S Coal Company → #1; 1987-05-08 to 1989-02-20; source msha-controller-operator-history
- **controller_controls_mine:** Doolin Jerry-Rondal Mills Jr Et Al → #1; 1987-05-08 to 1989-02-20; source msha-controller-operator-history
- **controller_controls_operator:** Doolin Jerry-Rondal Mills Jr Et Al → B & S Coal Company; 1987-05-08 to 1989-02-20; source msha-controller-operator-history
- **operator_operates_mine:** Dan'S Coal Company → #1; 1989-02-21 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Patterson Daniel → #1; 1989-02-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Patterson Daniel → Dan'S Coal Company; 1989-02-21 to current/open; source msha-controller-operator-history