# Relationship history for MSHA mine 4404247

Current hierarchy: **Perry Allen  Whited → Davis & Whited Coal Company Inc → Mine #6**

- 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:** Perry Allen  Whited → Mine #6; 1974-10-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Richardson Dowell → Mine #6; 1975-05-01 to 1979-05-15; source msha-controller-operator-history
- **operator_operates_mine:** H & S Coal Company Inc → Mine #6; 1975-12-01 to 1976-04-30; source msha-controller-operator-history
- **controller_controls_operator:** Richardson Dowell → H & S Coal Company Inc; 1975-12-01 to 1976-04-30; source msha-controller-operator-history
- **operator_operates_mine:** Richco Brothers Inc → Mine #6; 1976-05-01 to 1977-04-28; source msha-controller-operator-history
- **controller_controls_mine:** Richardson Edward → Mine #6; 1976-05-01 to 1977-04-28; source msha-controller-operator-history
- **controller_controls_operator:** Richardson Edward → Richco Brothers Inc; 1976-05-01 to 1977-04-28; source msha-controller-operator-history
- **operator_operates_mine:** H & S Coal Company Inc → Mine #6; 1977-04-29 to 1978-06-19; source msha-controller-operator-history
- **controller_controls_operator:** Richardson Dowell → H & S Coal Company Inc; 1977-04-29 to 1978-06-19; source msha-controller-operator-history
- **operator_operates_mine:** Davis & Whited Coal Company Inc → Mine #6; 1978-06-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Perry Allen  Whited → Davis & Whited Coal Company Inc; 1978-06-20 to current/open; source msha-controller-operator-history