# Relationship history for MSHA mine 4609268

Current hierarchy: **Patriot Coal Corporation → Coyote Coal Company LLC → Threemile Surface Mine**

- 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:** Magnum Coal Company → Threemile Surface Mine; 2007-08-15 to 2008-07-22; source msha-controller-operator-history
- **operator_operates_mine:** Coyote Coal Company LLC → Threemile Surface Mine; 2008-03-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Magnum Coal Company → Coyote Coal Company LLC; 2008-03-04 to 2008-07-22; source msha-controller-operator-history
- **controller_controls_mine:** Patriot Coal Corporation → Threemile Surface Mine; 2008-07-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Patriot Coal Corporation → Coyote Coal Company LLC; 2008-07-23 to current/open; source msha-controller-operator-history