# Relationship history for MSHA mine 4606857

Current hierarchy: **Kizer John E → Harvey Energy Corp → #6 Surface**

- 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:** Kizer John E → #6 Surface; 1980-09-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Harvey Energy Corp → #6 Surface; 1984-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kizer John E → Harvey Energy Corp; 1984-10-01 to current/open; source msha-controller-operator-history