# Relationship history for MSHA mine 0301446

Current hierarchy: **Mc Millon Arlon → Ouachita Sand & Gravel Company → Mena Pit And Plant**

- 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:** Berg Redi-Mix Inc → Mena Pit And Plant; 1979-01-01 to 1980-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Rutell Lonia → Mena Pit And Plant; 1979-01-01 to 1980-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Rutell Lonia → Berg Redi-Mix Inc; 1979-01-01 to 1980-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Ouachita Sand & Gravel Company → Mena Pit And Plant; 1980-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mc Millon Arlon → Mena Pit And Plant; 1980-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mc Millon Arlon → Ouachita Sand & Gravel Company; 1980-07-01 to current/open; source msha-controller-operator-history