# Relationship history for MSHA mine 1512985

Current hierarchy: **Hendrickson Eddie → R & H Coal Company → No 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** 5 M Mining Company → No 1; 1981-07-01 to 1982-08-08; source msha-controller-operator-history
- **controller_controls_mine:** Medley Vantoy Et Al → No 1; 1981-07-01 to 1982-08-08; source msha-controller-operator-history
- **controller_controls_operator:** Medley Vantoy Et Al → 5 M Mining Company; 1981-07-01 to 1982-08-08; source msha-controller-operator-history
- **operator_operates_mine:** R O R Coal Inc → No 1; 1982-08-09 to 1982-08-25; source msha-controller-operator-history
- **controller_controls_mine:** Stewart Leland F → No 1; 1982-08-09 to 1982-08-25; source msha-controller-operator-history
- **controller_controls_operator:** Stewart Leland F → R O R Coal Inc; 1982-08-09 to 1982-08-25; source msha-controller-operator-history
- **operator_operates_mine:** R O R Coal Inc → No 1; 1982-08-26 to 1983-01-02; source msha-controller-operator-history
- **controller_controls_mine:** Burke Richard → No 1; 1982-08-26 to 1983-01-02; source msha-controller-operator-history
- **controller_controls_operator:** Burke Richard → R O R Coal Inc; 1982-08-26 to 1983-01-02; source msha-controller-operator-history
- **operator_operates_mine:** Walnut Mountain Coal Company → No 1; 1983-01-03 to 1984-01-17; source msha-controller-operator-history
- **controller_controls_mine:** Vance Clell P Et Al → No 1; 1983-01-03 to 1984-01-17; source msha-controller-operator-history
- **controller_controls_operator:** Vance Clell P Et Al → Walnut Mountain Coal Company; 1983-01-03 to 1984-01-17; source msha-controller-operator-history
- **operator_operates_mine:** Four Star Enterprises Inc → No 1; 1984-01-18 to 1985-01-13; source msha-controller-operator-history
- **controller_controls_mine:** Lowe Danny → No 1; 1984-01-18 to 1985-01-13; source msha-controller-operator-history
- **controller_controls_operator:** Lowe Danny → Four Star Enterprises Inc; 1984-01-18 to 1985-01-13; source msha-controller-operator-history
- **controller_controls_mine:** Vandagriff Glen Doil → No 1; 1984-05-07 to 1987-05-09; source msha-controller-operator-history
- **operator_operates_mine:** Willie Coal Inc → No 1; 1985-01-14 to 1985-06-17; source msha-controller-operator-history
- **controller_controls_mine:** Wallen Glenn A → No 1; 1985-01-14 to 1985-06-17; source msha-controller-operator-history
- **controller_controls_operator:** Wallen Glenn A → Willie Coal Inc; 1985-01-14 to 1985-06-17; source msha-controller-operator-history
- **operator_operates_mine:** K & G Coal Company Inc → No 1; 1985-06-18 to 1986-07-06; source msha-controller-operator-history
- **controller_controls_operator:** Vandagriff Glen Doil → K & G Coal Company Inc; 1985-06-18 to 1986-07-06; source msha-controller-operator-history
- **operator_operates_mine:** Renee Coal Company Inc → No 1; 1986-07-07 to 1987-01-26; source msha-controller-operator-history
- **controller_controls_mine:** Jackson Barry → No 1; 1986-07-07 to 1987-01-26; source msha-controller-operator-history
- **controller_controls_operator:** Jackson Barry → Renee Coal Company Inc; 1986-07-07 to 1987-01-26; source msha-controller-operator-history
- **operator_operates_mine:** R & H Coal Company → No 1; 1987-01-27 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hendrickson Eddie Et Al → No 1; 1987-01-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hendrickson Eddie Et Al → R & H Coal Company; 1987-01-27 to current/open; source msha-controller-operator-history