# Relationship history for MSHA mine 3606978

Current hierarchy: **Global Energy → Lucerne Energy Inc → Lucerne #1**

- 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:** Lucerne Energy Inc → Lucerne #1; 1980-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Global Energy → Lucerne #1; 1980-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Global Energy → Lucerne Energy Inc; 1980-05-01 to current/open; source msha-controller-operator-history