# Relationship history for MSHA mine 1519276

Current hierarchy: **Keith D  McCoy → North Fork Colleries LLC → Dwarf 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:** Sidney R  Young III → Dwarf Mine; 2008-03-02 to 2008-12-31; source msha-controller-operator-history
- **operator_operates_mine:** North Fork Colleries LLC → Dwarf Mine; 2008-08-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sidney R  Young III → North Fork Colleries LLC; 2008-08-06 to 2008-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Keith D  McCoy → Dwarf Mine; 2009-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Keith D  McCoy → North Fork Colleries LLC; 2009-01-01 to current/open; source msha-controller-operator-history