# Relationship history for MSHA mine 4801916

Current hierarchy: **Jacob Edson Brodie → BRODIE EXCAVATION LLC → ROCK CREEK GRAVEL**

- 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:** BRODIE EXCAVATION LLC → ROCK CREEK GRAVEL; 2026-05-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jacob Edson Brodie → ROCK CREEK GRAVEL; 2026-05-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jacob Edson Brodie → BRODIE EXCAVATION LLC; 2026-05-12 to current/open; source msha-controller-operator-history