# Relationship history for MSHA mine 1518904

Current hierarchy: **Bennett  Quillen → Panzer Coal Inc → 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:** Panzer Coal Inc → No. 1; 2005-07-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Colette  Quillen → No. 1; 2005-07-26 to 2008-06-03; source msha-controller-operator-history
- **controller_controls_operator:** Colette  Quillen → Panzer Coal Inc; 2005-07-26 to 2008-06-03; source msha-controller-operator-history
- **controller_controls_mine:** Bennett  Quillen → No. 1; 2008-06-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bennett  Quillen → Panzer Coal Inc; 2008-06-04 to current/open; source msha-controller-operator-history