# Relationship history for MSHA mine 2401612

Current hierarchy: **Parker Rodney L & Sharon D → Parkers Construction → Green Campbell Properties**

- 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

- **operator_operates_mine:** Patrick Harrison Mining Corp → Green Campbell Properties; 1981-04-01 to 1996-03-05; source msha-controller-operator-history
- **controller_controls_mine:** Harrison Ernest W → Green Campbell Properties; 1981-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Harrison Ernest W → Patrick Harrison Mining Corp; 1981-04-01 to 1996-03-05; source msha-controller-operator-history
- **operator_operates_mine:** Parkers Construction → Green Campbell Properties; 1996-03-06 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Parker Rodney L & Sharon D → Green Campbell Properties; 1996-03-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Parker Rodney L & Sharon D → Parkers Construction; 1996-03-06 to current/open; source msha-controller-operator-history