# Relationship history for MSHA mine 1102715

Current hierarchy: **Chamness Margaret → E & B Coal Company → Corinth (Strip)**

- 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:** Chamness Margaret → Corinth (Strip); 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** E & B Coal Company → Corinth (Strip); 1980-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Chamness Margaret → E & B Coal Company; 1980-03-01 to current/open; source msha-controller-operator-history