# Relationship history for MSHA mine 4606661

Current hierarchy: **Cook Everett J → E C Coal Sales Company Inc → E C #3**

- 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:** Lieberman Charles → E C #3; 1980-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Chafe Mining Company Inc → E C #3; 1983-06-01 to 1983-11-13; source msha-controller-operator-history
- **controller_controls_operator:** Lieberman Charles → Chafe Mining Company Inc; 1983-06-01 to 1983-11-13; source msha-controller-operator-history
- **operator_operates_mine:** E C Coal Sales Company Inc → E C #3; 1983-11-14 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Cook Everett J → E C #3; 1983-11-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cook Everett J → E C Coal Sales Company Inc; 1983-11-14 to current/open; source msha-controller-operator-history