# Relationship history for MSHA mine 3608856

Current hierarchy: **City Trust Of Philadelphia → Girardville Coal Company → Hammond Bank**

- 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

- **controller_controls_mine:** City Trust Of Philadelphia → Hammond Bank; 1996-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Girardville Coal Company → Hammond Bank; 2000-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** City Trust Of Philadelphia → Girardville Coal Company; 2000-06-01 to current/open; source msha-controller-operator-history