# Relationship history for MSHA mine 1519394

Current hierarchy: **Robert B  Hughes → MG Energy LLC → No. 1**

- 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:** Charles T  Norman → No. 1; 2001-09-24 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Sassy Coal Co., Inc. → No. 1; 2009-03-17 to 2010-05-11; source msha-controller-operator-history
- **controller_controls_operator:** Charles T  Norman → Sassy Coal Co., Inc.; 2009-03-17 to 2010-05-11; source msha-controller-operator-history
- **operator_operates_mine:** MG Energy LLC → No. 1; 2010-05-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Robert B  Hughes → No. 1; 2010-05-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert B  Hughes → MG Energy LLC; 2010-05-12 to current/open; source msha-controller-operator-history