# Relationship history for MSHA mine 2003227

Current hierarchy: **Mike  Greaves; Pam  Greaves → Kurtis Greaves → Buzzell Road 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

- **operator_operates_mine:** JIM GREAVES → Buzzell Road Pit; 2001-09-27 to 2004-11-17; source msha-controller-operator-history
- **controller_controls_mine:** JIM  GREAVES → Buzzell Road Pit; 2001-09-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** JIM  GREAVES → JIM GREAVES; 2001-09-27 to 2004-11-17; source msha-controller-operator-history
- **operator_operates_mine:** Mike Greaves → Buzzell Road Pit; 2004-11-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Pam  Greaves et al → Buzzell Road Pit; 2004-11-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pam  Greaves et al → Mike Greaves; 2004-11-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mike  Greaves et al → Mike Greaves; 2004-11-18 to current/open; source msha-controller-operator-history