# Relationship history for MSHA mine 4002681

Current hierarchy: **Reynolds H M → Natural Energy Company → Natural Energy Area No 1**

- 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:** Natural Energy Company → Natural Energy Area No 1; 1981-02-01 to 1981-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Cannon Van D & Roland Recchia → Natural Energy Area No 1; 1981-02-01 to 1981-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Cannon Van D & Roland Recchia → Natural Energy Company; 1981-02-01 to 1981-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Natural Energy Company → Natural Energy Area No 1; 1981-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Reynolds H M → Natural Energy Area No 1; 1981-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Reynolds H M → Natural Energy Company; 1981-10-01 to current/open; source msha-controller-operator-history