# Relationship history for MSHA mine 4406721

Current hierarchy: **Raymond  Cline → Smurfco Inc → No 2**

- 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

- **operator_operates_mine:** Harvest Coal Inc → No 2; 1992-11-01 to 1993-08-01; source msha-controller-operator-history
- **controller_controls_mine:** Dick J  Plaster → No 2; 1992-11-01 to 1995-08-15; source msha-controller-operator-history
- **controller_controls_operator:** Dick J  Plaster → Harvest Coal Inc; 1992-11-01 to 1993-08-01; source msha-controller-operator-history
- **controller_controls_mine:** Raymond  Cline → No 2; 1992-12-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Smurfco Inc → No 2; 1993-08-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Raymond  Cline → Smurfco Inc; 1993-08-02 to current/open; source msha-controller-operator-history