# Relationship history for MSHA mine 4201114

Current hierarchy: **Lammert James → Lammert Mining Company → State Lease 8066**

- 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:** Lammert Mining Company → State Lease 8066; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lammert James → State Lease 8066; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lammert James → Lammert Mining Company; 1950-01-01 to current/open; source msha-controller-operator-history