# Relationship history for MSHA mine 1519072

Current hierarchy: **Gary A  Endicott → TUG RIVER SAND → Tug River Sand Inc**

- 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:** TUG RIVER SAND → Tug River Sand Inc; 2006-12-22 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Gary A  Endicott → Tug River Sand Inc; 2006-12-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gary A  Endicott → TUG RIVER SAND; 2006-12-22 to current/open; source msha-controller-operator-history