# Relationship history for MSHA mine 0102012

Current hierarchy: **Mc Guire Harvey → C & G Coal Company Inc → Owens Mine**

- 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:** Mc Guire Harvey → Owens Mine; 1976-09-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** C & G Coal Company Inc → Owens Mine; 1979-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mc Guire Harvey → C & G Coal Company Inc; 1979-02-01 to current/open; source msha-controller-operator-history