# Relationship history for MSHA mine 4000676

Current hierarchy: **Cole Paul E → Paul Cole Coal Company → No 3 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

- **operator_operates_mine:** Waters Coal & Construction Company → No 3 Strip; 1950-01-01 to 1974-08-23; source msha-controller-operator-history
- **controller_controls_mine:** Waters Glen E → No 3 Strip; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Waters Glen E → Waters Coal & Construction Company; 1950-01-01 to 1974-08-23; source msha-controller-operator-history
- **operator_operates_mine:** Paul Cole Coal Company → No 3 Strip; 1974-08-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Cole Paul E → No 3 Strip; 1974-08-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cole Paul E → Paul Cole Coal Company; 1974-08-24 to current/open; source msha-controller-operator-history