# Relationship history for MSHA mine 3608084

Current hierarchy: **Grondstof Enterprise C V → Cac Energy Inc → Export Pile**

- 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:** Cac Energy Inc → Export Pile; 1989-05-01 to 1993-01-14; source msha-controller-operator-history
- **controller_controls_mine:** Geevor Inc → Export Pile; 1989-05-01 to 1993-01-14; source msha-controller-operator-history
- **controller_controls_operator:** Geevor Inc → Cac Energy Inc; 1989-05-01 to 1993-01-14; source msha-controller-operator-history
- **operator_operates_mine:** Cac Energy Inc → Export Pile; 1993-01-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Grondstof Enterprise C V → Export Pile; 1993-01-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Grondstof Enterprise C V → Cac Energy Inc; 1993-01-15 to current/open; source msha-controller-operator-history