# Relationship history for MSHA mine 1519103

Current hierarchy: **Robert O  Roan → M & G MINING, LLC → M & G #4**

- 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:** Robert O  Roan → M & G #4; 2001-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Robert O  Roan → M & G #4; 2007-03-12 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** ROCO ENTERPRISES, INC. → M & G #4; 2007-05-01 to 2008-12-09; source msha-controller-operator-history
- **controller_controls_operator:** Robert O  Roan → ROCO ENTERPRISES, INC.; 2007-05-01 to 2008-12-09; source msha-controller-operator-history
- **operator_operates_mine:** M & G MINING, LLC → M & G #4; 2008-12-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert O  Roan → M & G MINING, LLC; 2008-12-10 to current/open; source msha-controller-operator-history