# Relationship history for MSHA mine 4601800

Current hierarchy: **Carneal William L → Carneal Coal Company → No 1**

- 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:** Brooks Coal Company → No 1; 1950-01-01 to 1973-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Brooks Charles H → No 1; 1950-01-01 to 1973-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Brooks Charles H → Brooks Coal Company; 1950-01-01 to 1973-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Carneal William L → No 1; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Carneal Coal Company → No 1; 1974-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carneal William L → Carneal Coal Company; 1974-01-01 to current/open; source msha-controller-operator-history