# Relationship history for MSHA mine 1513440

Current hierarchy: **Wyan Peggy & Charles → C & F Coal Company → No 1 Surface**

- 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:** C & F Coal Company → No 1 Surface; 1982-04-01 to 1983-04-21; source msha-controller-operator-history
- **controller_controls_mine:** Gross Charles & Floyd → No 1 Surface; 1982-04-01 to 1983-04-21; source msha-controller-operator-history
- **controller_controls_operator:** Gross Charles & Floyd → C & F Coal Company; 1982-04-01 to 1983-04-21; source msha-controller-operator-history
- **operator_operates_mine:** C & F Coal Company → No 1 Surface; 1983-04-22 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Wyan Peggy & Charles → No 1 Surface; 1983-04-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wyan Peggy & Charles → C & F Coal Company; 1983-04-22 to current/open; source msha-controller-operator-history