# Relationship history for MSHA mine 1500112

Current hierarchy: **Allen Company Inc → Allen Company Inc → Clover Bottom Underground**

- 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 A Walker Llc → Clover Bottom Underground; 1950-01-01 to 2004-06-29; source msha-controller-operator-history
- **controller_controls_mine:** Lyle A  Walker → Clover Bottom Underground; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lyle A  Walker → M A Walker Llc; 1950-01-01 to 2004-06-29; source msha-controller-operator-history
- **controller_controls_mine:** Allen Company Inc → Clover Bottom Underground; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Allen Company Inc → Clover Bottom Underground; 2004-06-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Allen Company Inc → Allen Company Inc; 2004-06-30 to current/open; source msha-controller-operator-history