# Relationship history for MSHA mine 3608268

Current hierarchy: **Nicholson Ewing Jr & Randy → R & J Coal Inc → R & J #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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Nicholson Ewing Jr & Randy → R & J #1; 1988-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** R & J Coal Inc → R & J #1; 1991-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Nicholson Ewing Jr & Randy → R & J Coal Inc; 1991-06-01 to current/open; source msha-controller-operator-history