# Relationship history for MSHA mine 4604991

Current hierarchy: **Larry A  Lough; Lewis E  Addair → M & M Coal Company Inc → No1**

- 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:** M & M Coal Company → No1; 1950-01-01 to 1979-06-17; source msha-controller-operator-history
- **controller_controls_mine:** Muncy Danny & Wesley Miller → No1; 1950-01-01 to 1979-06-17; source msha-controller-operator-history
- **controller_controls_operator:** Muncy Danny & Wesley Miller → M & M Coal Company; 1950-01-01 to 1979-06-17; source msha-controller-operator-history
- **operator_operates_mine:** M & M Coal Company → No1; 1979-06-18 to 1980-06-01; source msha-controller-operator-history
- **controller_controls_mine:** Lefler Howard → No1; 1979-06-18 to 1980-06-01; source msha-controller-operator-history
- **controller_controls_operator:** Lefler Howard → M & M Coal Company; 1979-06-18 to 1980-06-01; source msha-controller-operator-history
- **operator_operates_mine:** M & M Coal Company Inc → No1; 1980-06-02 to 1981-01-20; source msha-controller-operator-history
- **controller_controls_mine:** Cline Gordon & Gordie → No1; 1980-06-02 to 1981-01-20; source msha-controller-operator-history
- **controller_controls_operator:** Cline Gordon & Gordie → M & M Coal Company Inc; 1980-06-02 to 1981-01-20; source msha-controller-operator-history
- **operator_operates_mine:** M & M Coal Company Inc → No1; 1981-01-21 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lewis E  Addair et al → No1; 1981-01-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lewis E  Addair et al → M & M Coal Company Inc; 1981-01-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Larry A  Lough et al → M & M Coal Company Inc; 1981-01-21 to current/open; source msha-controller-operator-history