# Relationship history for MSHA mine 1513996

Current hierarchy: **Griffith Clyde → Kids Coal Company → Kids Coal Co**

- 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

- **operator_operates_mine:** Kids Coal Company → Kids Coal Co; 1983-03-01 to 1983-08-08; source msha-controller-operator-history
- **controller_controls_mine:** Griffith Clyde → Kids Coal Co; 1983-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Griffith Clyde → Kids Coal Company; 1983-03-01 to 1983-08-08; source msha-controller-operator-history
- **operator_operates_mine:** Kids Coal Company → Kids Coal Co; 1983-08-09 to 1983-10-27; source msha-controller-operator-history
- **controller_controls_mine:** Wilson Billy & Tony Powers → Kids Coal Co; 1983-08-09 to 1983-10-27; source msha-controller-operator-history
- **controller_controls_operator:** Wilson Billy & Tony Powers → Kids Coal Company; 1983-08-09 to 1983-10-27; source msha-controller-operator-history
- **operator_operates_mine:** Kids Coal Company → Kids Coal Co; 1983-10-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Griffith Clyde → Kids Coal Company; 1983-10-28 to current/open; source msha-controller-operator-history