# Relationship history for MSHA mine 2902330

Current hierarchy: **Jerry  Sebring → J Rock Construction → Vera Cruz**

- 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:** J Rock Construction → Vera Cruz; 2006-11-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jerry  Sebring → Vera Cruz; 2006-11-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jerry  Sebring → J Rock Construction; 2006-11-13 to current/open; source msha-controller-operator-history