# Relationship history for MSHA mine 1512007

Current hierarchy: **Mallas Jim G → Omega Energy Inc → No 1 Prep Plant**

- 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

- **controller_controls_mine:** Mallas Jim G → No 1 Prep Plant; 1978-03-20 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Omega Energy Inc → No 1 Prep Plant; 1979-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mallas Jim G → Omega Energy Inc; 1979-08-01 to current/open; source msha-controller-operator-history