# Relationship history for MSHA mine 3601530

Current hierarchy: **Huston Maurice & L Roy → Valent Coal Company → Valent 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

- **operator_operates_mine:** Valent Coal Company → Valent Mine; 1950-01-01 to 1970-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Valent John → Valent Mine; 1950-01-01 to 1970-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Valent John → Valent Coal Company; 1950-01-01 to 1970-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Valent Coal Company → Valent Mine; 1970-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Huston Maurice & L Roy → Valent Mine; 1970-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Huston Maurice & L Roy → Valent Coal Company; 1970-07-01 to current/open; source msha-controller-operator-history