# Relationship history for MSHA mine 3800647

Current hierarchy: **Manuel Barney & Jim Elliot → Panex-Ec → GREER PIT**

- 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

- **controller_controls_mine:** Milton R  Boyette  et al → GREER PIT; 1950-01-01 to 1994-11-09; source msha-controller-operator-history
- **operator_operates_mine:** Augusta Sand & Gravel Inc → GREER PIT; 1990-09-01 to 1994-11-09; source msha-controller-operator-history
- **controller_controls_operator:** Milton R  Boyette  et al → Augusta Sand & Gravel Inc; 1990-09-01 to 1994-11-09; source msha-controller-operator-history
- **operator_operates_mine:** Panex-Ec → GREER PIT; 1994-11-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Manuel Barney & Jim Elliot → GREER PIT; 1994-11-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Manuel Barney & Jim Elliot → Panex-Ec; 1994-11-10 to current/open; source msha-controller-operator-history