# Relationship history for MSHA mine 1511466

Current hierarchy: **Kaneb Services Inc → Mecklenburg Coal & Mining Inc → Parvin**

- 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:** Anderson & Anderson Inc → Parvin; 1977-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mecklenburg Coal & Mining Company → Parvin; 1978-07-01 to 1979-06-21; source msha-controller-operator-history
- **controller_controls_operator:** Anderson & Anderson Inc → Mecklenburg Coal & Mining Company; 1978-07-01 to 1979-06-21; source msha-controller-operator-history
- **operator_operates_mine:** Mecklenburg Coal & Mining Inc → Parvin; 1979-06-22 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kaneb Services Inc → Parvin; 1979-06-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kaneb Services Inc → Mecklenburg Coal & Mining Inc; 1979-06-22 to current/open; source msha-controller-operator-history