# Relationship history for MSHA mine 3608641

Current hierarchy: **Randy C  Rothermel → Rothermel Coal Company → No 13 Slope**

- 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:** Randy C  Rothermel et al → No 13 Slope; 1993-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Rothermel Coal Company → No 13 Slope; 1997-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Randy C  Rothermel et al → Rothermel Coal Company; 1997-05-01 to current/open; source msha-controller-operator-history