# Relationship history for MSHA mine 4606446

Current hierarchy: **Kizer John E → Energy Enterprises Inc → #2 Surface Mine**

- 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:** Nettleship B B → #2 Surface Mine; 1980-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Maple Mining Inc → #2 Surface Mine; 1981-11-01 to 1982-10-14; source msha-controller-operator-history
- **controller_controls_operator:** Nettleship B B → Maple Mining Inc; 1981-11-01 to 1982-10-14; source msha-controller-operator-history
- **operator_operates_mine:** Energy Enterprises Inc → #2 Surface Mine; 1982-10-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kizer John E → #2 Surface Mine; 1982-10-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kizer John E → Energy Enterprises Inc; 1982-10-15 to current/open; source msha-controller-operator-history