# Relationship history for MSHA mine 3503770

Current hierarchy: **Robert R.  Carlon Jr.; Robert R.  Carlon Sr. → Carlon's Gravel Pit LLC → Carlon's Gravel Pit LLC**

- 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:** Carlon's Gravel Pit LLC → Carlon's Gravel Pit LLC; 2011-10-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Robert R.  Carlon Sr. et al → Carlon's Gravel Pit LLC; 2011-10-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert R.  Carlon Sr. et al → Carlon's Gravel Pit LLC; 2011-10-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert R.  Carlon Jr. et al → Carlon's Gravel Pit LLC; 2011-10-05 to current/open; source msha-controller-operator-history