# Relationship history for MSHA mine 1511352

Current hierarchy: **Clevinger David-William Roscoe → A M F Mining Company Inc → No 2 Mine**

- 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:** Clevinger David-William Roscoe Et Al → No 2 Mine; 1978-03-23 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** A M F Mining Company Inc → No 2 Mine; 1978-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Clevinger David-William Roscoe Et Al → A M F Mining Company Inc; 1978-05-01 to current/open; source msha-controller-operator-history