# Relationship history for MSHA mine 0403993

Current hierarchy: **Mastelotto James → Lassenite Industries Inc → Lassenite**

- 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:** Lassenite Industries Inc → Lassenite; 1950-01-01 to 1980-08-19; source msha-controller-operator-history
- **controller_controls_mine:** Gregory Daniel S → Lassenite; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gregory Daniel S → Lassenite Industries Inc; 1950-01-01 to 1980-08-19; source msha-controller-operator-history
- **operator_operates_mine:** Lassenite Industries Inc → Lassenite; 1980-08-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mastelotto James → Lassenite; 1980-08-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mastelotto James → Lassenite Industries Inc; 1980-08-20 to current/open; source msha-controller-operator-history