# Relationship history for MSHA mine 1103071

Current hierarchy: **ACNR Holdings, Inc → American Coal Company → Galatia Mine Mellennium Portal**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Robert E  Murray → Galatia Mine Mellennium Portal; 1998-06-18 to 2020-09-16; source msha-controller-operator-history
- **operator_operates_mine:** American Coal Company → Galatia Mine Mellennium Portal; 2000-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert E  Murray → American Coal Company; 2000-08-01 to 2020-09-16; source msha-controller-operator-history
- **controller_controls_mine:** ACNR Holdings, Inc → Galatia Mine Mellennium Portal; 2020-09-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** ACNR Holdings, Inc → American Coal Company; 2020-09-17 to current/open; source msha-controller-operator-history