# Relationship history for MSHA mine 1511845

Current hierarchy: **Greer Perry L → Cape Coal Corp → #2 Surface Bean Fork**

- 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:** Greer Perry L → #2 Surface Bean Fork; 1978-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Cape Coal Corp → #2 Surface Bean Fork; 1979-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Greer Perry L → Cape Coal Corp; 1979-03-01 to current/open; source msha-controller-operator-history