# Relationship history for MSHA mine 4700866

Current hierarchy: **Randall A Johnson; Jill L Pesick → Johnson Sand & Gravel Inc → J J Pit And Mill**

- 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:** Johnson Sand & Gravel Inc → J J Pit And Mill; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jeffrey G  Johnson et al → J J Pit And Mill; 1950-01-01 to 2022-01-28; source msha-controller-operator-history
- **controller_controls_operator:** Jeffrey G  Johnson et al → Johnson Sand & Gravel Inc; 1950-01-01 to 2022-01-28; source msha-controller-operator-history
- **controller_controls_mine:** Jill L Pesick et al → J J Pit And Mill; 2022-01-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jill L Pesick et al → Johnson Sand & Gravel Inc; 2022-01-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Randall A Johnson et al → Johnson Sand & Gravel Inc; 2022-01-29 to current/open; source msha-controller-operator-history