# Relationship history for MSHA mine 1510884

Current hierarchy: **Adkins James E Ii → Havco Energy Inc → No 1 Refuse Pile**

- 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:** Havco Energy Inc → No 1 Refuse Pile; 1977-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Adkins James E Ii → No 1 Refuse Pile; 1977-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Adkins James E Ii → Havco Energy Inc; 1977-11-01 to current/open; source msha-controller-operator-history