# Relationship history for MSHA mine 4202781

Current hierarchy: **Shane Phil Morrison → Morrison Rock L.L.C → Junction gravel pit**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Morrison Rock L.L.C → Junction gravel pit; 2025-04-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Shane Phil Morrison → Junction gravel pit; 2025-04-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Shane Phil Morrison → Morrison Rock L.L.C; 2025-04-09 to current/open; source msha-controller-operator-history