# Relationship history for MSHA mine 1502592

Current hierarchy: **Leone Russell & Anthony → Carmella Coal & Minerals Inc → No 1-A 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

- **operator_operates_mine:** Sharon Holbrook Coal Company Inc → No 1-A Mine; 1970-01-10 to 1973-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Holbrook Sharon Coal Company Inc → No 1-A Mine; 1970-01-10 to 1973-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Holbrook Sharon Coal Company Inc → Sharon Holbrook Coal Company Inc; 1970-01-10 to 1973-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Carmella Coal & Minerals Inc → No 1-A Mine; 1974-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Leone Russell & Anthony → No 1-A Mine; 1974-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Leone Russell & Anthony → Carmella Coal & Minerals Inc; 1974-01-01 to current/open; source msha-controller-operator-history