# Relationship history for MSHA mine 3600880

Current hierarchy: **Pennsylvania Power & Light Company → Lady Jane Collieries Inc → Stott #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:** Lady Jane Collieries Inc → Stott #1; 1950-01-01 to 1983-03-14; source msha-controller-operator-history
- **controller_controls_mine:** Lady Jane Collieries Inc → Stott #1; 1950-01-01 to 1983-03-14; source msha-controller-operator-history
- **controller_controls_operator:** Lady Jane Collieries Inc → Lady Jane Collieries Inc; 1950-01-01 to 1983-03-14; source msha-controller-operator-history
- **operator_operates_mine:** Lady Jane Collieries Inc → Stott #1; 1983-03-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Pennsylvania Power & Light Company → Stott #1; 1983-03-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pennsylvania Power & Light Company → Lady Jane Collieries Inc; 1983-03-15 to current/open; source msha-controller-operator-history