# Relationship history for MSHA mine 4605634

Current hierarchy: **Hay Thomas L → Consolidated Energy Corp → Apex No 2**

- 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:** Falgiani Phillip → Apex No 2; 1976-10-08 to 1987-08-11; source msha-controller-operator-history
- **operator_operates_mine:** Apex Coal Corp → Apex No 2; 1977-09-01 to 1983-10-23; source msha-controller-operator-history
- **controller_controls_operator:** Falgiani Phillip → Apex Coal Corp; 1977-09-01 to 1983-10-23; source msha-controller-operator-history
- **operator_operates_mine:** Consolidated Energy Corp → Apex No 2; 1983-10-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hay Thomas L → Apex No 2; 1983-10-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hay Thomas L → Consolidated Energy Corp; 1983-10-24 to current/open; source msha-controller-operator-history