# Relationship history for MSHA mine 4604624

Current hierarchy: **Toney David H → Rock Run Mining Inc → No 1 Mine**

- 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:** Charles T  Jones et al → No 1 Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Amherst Coal Company → No 1 Mine; 1975-05-16 to 1982-08-14; source msha-controller-operator-history
- **controller_controls_operator:** Charles T  Jones et al → Amherst Coal Company; 1975-05-16 to 1982-08-14; source msha-controller-operator-history
- **controller_controls_operator:** H E  Jones Jr et al → Amherst Coal Company; 1975-05-16 to 1982-08-14; source msha-controller-operator-history
- **controller_controls_mine:** Diamond Shamrock Corp → No 1 Mine; 1981-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Amherst Coal Company → No 1 Mine; 1982-08-15 to 1986-05-13; source msha-controller-operator-history
- **controller_controls_operator:** Diamond Shamrock Corp → Amherst Coal Company; 1982-08-15 to 1986-05-13; source msha-controller-operator-history
- **controller_controls_mine:** James F  Vance et al → No 1 Mine; 1983-07-07 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Southern Coal & Trucking Inc → No 1 Mine; 1986-05-14 to 1987-11-22; source msha-controller-operator-history
- **controller_controls_operator:** James F  Vance et al → Southern Coal & Trucking Inc; 1986-05-14 to 1987-11-22; source msha-controller-operator-history
- **controller_controls_operator:** Thurl D  Vance et al → Southern Coal & Trucking Inc; 1986-05-14 to 1987-11-22; source msha-controller-operator-history
- **controller_controls_mine:** Ashland Inc et al → No 1 Mine; 1987-05-19 to 2005-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Arch Of West Virginia → No 1 Mine; 1987-11-23 to 1988-07-10; source msha-controller-operator-history
- **controller_controls_operator:** Ashland Inc et al → Arch Of West Virginia; 1987-11-23 to 1988-07-10; source msha-controller-operator-history
- **operator_operates_mine:** Rock Run Mining Inc → No 1 Mine; 1988-07-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Toney David H → No 1 Mine; 1988-07-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Toney David H → Rock Run Mining Inc; 1988-07-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Magnum Coal Company → No 1 Mine; 2006-01-01 to 2008-07-22; source msha-controller-operator-history
- **controller_controls_operator:** Magnum Coal Company → Arch Of West Virginia; 2006-01-01 to 1988-07-10; source msha-controller-operator-history
- **controller_controls_mine:** Patriot Coal Corporation → No 1 Mine; 2008-07-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Patriot Coal Corporation → Arch Of West Virginia; 2008-07-23 to 1988-07-10; source msha-controller-operator-history