# Relationship history for MSHA mine 1518282

Current hierarchy: **Henry  Chaney Jr → Cheyenne Elkhorn Coal Co. → #7B**

- 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:** Henry  Chaney Jr → #7B; 1976-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Rex  Fought → #7B; 1992-10-02 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Garrett Mining Inc → #7B; 2000-09-01 to 2002-11-18; source msha-controller-operator-history
- **controller_controls_operator:** Rex  Fought → Garrett Mining Inc; 2000-09-01 to 2002-11-18; source msha-controller-operator-history
- **operator_operates_mine:** Cheyenne Elkhorn Coal Co. → #7B; 2002-11-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Henry  Chaney Jr → Cheyenne Elkhorn Coal Co.; 2002-11-19 to current/open; source msha-controller-operator-history