# Relationship history for MSHA mine 4202187

Current hierarchy: **Ryan  Corley; Neil E  Ginther → San Juan Minerals LLC → BLUE CRYSTAL MINES LA SAL PROJEC**

- 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

- **operator_operates_mine:** Blue Crystal Mines → BLUE CRYSTAL MINES LA SAL PROJEC; 1997-10-01 to 2006-03-31; source msha-controller-operator-history
- **controller_controls_mine:** William  Harrison → BLUE CRYSTAL MINES LA SAL PROJEC; 1997-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William  Harrison → Blue Crystal Mines; 1997-10-01 to 2006-03-31; source msha-controller-operator-history
- **operator_operates_mine:** San Juan Minerals LLC → BLUE CRYSTAL MINES LA SAL PROJEC; 2006-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Neil E  Ginther et al → BLUE CRYSTAL MINES LA SAL PROJEC; 2006-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Neil E  Ginther et al → San Juan Minerals LLC; 2006-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ryan  Corley et al → San Juan Minerals LLC; 2006-04-01 to current/open; source msha-controller-operator-history