# Relationship history for MSHA mine 3607909

Current hierarchy: **Myrtetus George B → S C P Inc → Fell Plant**

- 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:** Fell Coal Company → Fell Plant; 1987-08-01 to 1988-11-14; source msha-controller-operator-history
- **controller_controls_mine:** Mufred Inc & Scp Inc → Fell Plant; 1987-08-01 to 1988-11-14; source msha-controller-operator-history
- **controller_controls_operator:** Mufred Inc & Scp Inc → Fell Coal Company; 1987-08-01 to 1988-11-14; source msha-controller-operator-history
- **operator_operates_mine:** S C P Inc → Fell Plant; 1988-11-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Myrtetus George B → Fell Plant; 1988-11-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Myrtetus George B → S C P Inc; 1988-11-15 to current/open; source msha-controller-operator-history