# Relationship history for MSHA mine 4404611

Current hierarchy: **Ernest E  Varney → Black Widow Coal Company Inc → No 2 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Ernest E  Varney et al → No 2 Mine; 1976-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** H H & H Coal Company → No 2 Mine; 1977-01-01 to 1977-08-23; source msha-controller-operator-history
- **controller_controls_mine:** Hopkins Richard-Gerald & W L → No 2 Mine; 1977-01-01 to 1977-08-23; source msha-controller-operator-history
- **controller_controls_operator:** Hopkins Richard-Gerald & W L → H H & H Coal Company; 1977-01-01 to 1977-08-23; source msha-controller-operator-history
- **operator_operates_mine:** B & J Coal Company → No 2 Mine; 1977-08-24 to 1977-10-09; source msha-controller-operator-history
- **controller_controls_mine:** Manuel Jerry V & Billy E Boyd → No 2 Mine; 1977-08-24 to 1977-10-09; source msha-controller-operator-history
- **controller_controls_operator:** Manuel Jerry V & Billy E Boyd → B & J Coal Company; 1977-08-24 to 1977-10-09; source msha-controller-operator-history
- **operator_operates_mine:** Black Widow Coal Company Inc → No 2 Mine; 1977-10-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ernest E  Varney et al → Black Widow Coal Company Inc; 1977-10-10 to current/open; source msha-controller-operator-history