# Relationship history for MSHA mine 1510341

Current hierarchy: **Mel (Van)  Villines → West Kentucky Coal Sales Inc → Blueflame Ramp-Strip**

- 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:** Mel (Van)  Villines → Blueflame Ramp-Strip; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Valley Energy Resources → Blueflame Ramp-Strip; 1976-10-26 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Valley Mining Company Inc → Blueflame Ramp-Strip; 1977-02-01 to 1979-07-12; source msha-controller-operator-history
- **controller_controls_operator:** Valley Energy Resources → Valley Mining Company Inc; 1977-02-01 to 1979-07-12; source msha-controller-operator-history
- **operator_operates_mine:** West Kentucky Coal Sales Inc → Blueflame Ramp-Strip; 1979-07-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mel (Van)  Villines → West Kentucky Coal Sales Inc; 1979-07-13 to current/open; source msha-controller-operator-history