# Relationship history for MSHA mine 1201908

Current hierarchy: **Hartman John F → C C M Inc → Castle Hill Pit #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

- **operator_operates_mine:** C C M Inc → Castle Hill Pit #2; 1983-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hartman John F → Castle Hill Pit #2; 1983-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hartman John F → C C M Inc; 1983-03-01 to current/open; source msha-controller-operator-history