# Relationship history for MSHA mine 4606366

Current hierarchy: **Jones David C → Angus Mining Company Inc → No 2**

- 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:** Jones David C → No 2; 1978-02-15 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Angus Mining Company Inc → No 2; 1981-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jones David C → Angus Mining Company Inc; 1981-07-01 to current/open; source msha-controller-operator-history