# Relationship history for MSHA mine 4602693

Current hierarchy: **White Richard N → M L M Corp → Dexcar Queen Tipple**

- 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:** Dexcar Queen Coal Company Inc → Dexcar Queen Tipple; 1950-01-01 to 1981-10-12; source msha-controller-operator-history
- **controller_controls_mine:** Harris Lynn → Dexcar Queen Tipple; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Harris Lynn → Dexcar Queen Coal Company Inc; 1950-01-01 to 1981-10-12; source msha-controller-operator-history
- **controller_controls_mine:** White Richard N → Dexcar Queen Tipple; 1977-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** M L M Corp → Dexcar Queen Tipple; 1981-10-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** White Richard N → M L M Corp; 1981-10-13 to current/open; source msha-controller-operator-history