# Relationship history for MSHA mine 4102329

Current hierarchy: **Norman D  Miller Jr → Miller Sand Company Inc → River 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Morgan Sand Company → River Pit; 1950-01-01 to 1984-10-01; source msha-controller-operator-history
- **controller_controls_mine:** Morgan James M → River Pit; 1950-01-01 to 1984-10-01; source msha-controller-operator-history
- **controller_controls_operator:** Morgan James M → Morgan Sand Company; 1950-01-01 to 1984-10-01; source msha-controller-operator-history
- **controller_controls_mine:** Norman D  Miller Jr → River Pit; 1979-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Imt Inc → River Pit; 1984-10-02 to 1986-05-05; source msha-controller-operator-history
- **controller_controls_mine:** Tanner B L → River Pit; 1984-10-02 to 1986-05-05; source msha-controller-operator-history
- **controller_controls_operator:** Tanner B L → Imt Inc; 1984-10-02 to 1986-05-05; source msha-controller-operator-history
- **operator_operates_mine:** Miller Sand Company Inc → River Pit; 1986-05-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Norman D  Miller Jr → Miller Sand Company Inc; 1986-05-06 to current/open; source msha-controller-operator-history