# Relationship history for MSHA mine 3608652

Current hierarchy: **Jerry L  Johnson → Johnson Quarries Inc → Rocky Forest**

- 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:** Jerry L  Johnson → Rocky Forest; 1997-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Johnson Quarries Inc → Rocky Forest; 1997-06-01 to 2007-03-15; source msha-controller-operator-history
- **controller_controls_operator:** Jerry L  Johnson → Johnson Quarries Inc; 1997-06-01 to 2007-03-15; source msha-controller-operator-history
- **controller_controls_mine:** Enos E  Yoder et al → Rocky Forest; 2005-07-29 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** R & E Quarry → Rocky Forest; 2007-03-16 to 2009-11-22; source msha-controller-operator-history
- **controller_controls_operator:** Enos E  Yoder et al → R & E Quarry; 2007-03-16 to 2009-11-22; source msha-controller-operator-history
- **controller_controls_operator:** Raymond  Mast et al → R & E Quarry; 2007-03-16 to 2009-11-22; source msha-controller-operator-history
- **operator_operates_mine:** Johnson Quarries Inc → Rocky Forest; 2009-11-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jerry L  Johnson → Johnson Quarries Inc; 2009-11-23 to current/open; source msha-controller-operator-history