# Relationship history for MSHA mine 1507229

Current hierarchy: **Holbrook Eddie & Kermit Rutherford → Double R & H Coal Co → No 1 Preparation 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

- **controller_controls_mine:** Potter Elwood & Ellie Clevinger → No 1 Preparation Plant; 1974-01-01 to 1975-08-13; source msha-controller-operator-history
- **operator_operates_mine:** C & P Coal Company Inc → No 1 Preparation Plant; 1974-05-20 to 1975-08-13; source msha-controller-operator-history
- **controller_controls_operator:** Potter Elwood & Ellie Clevinger → C & P Coal Company Inc; 1974-05-20 to 1975-08-13; source msha-controller-operator-history
- **controller_controls_mine:** Holbrook Eddie & Kermit Rutherford → No 1 Preparation Plant; 1975-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Double R & H Coal Co → No 1 Preparation Plant; 1975-08-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Holbrook Eddie & Kermit Rutherford → Double R & H Coal Co; 1975-08-14 to current/open; source msha-controller-operator-history