# Relationship history for MSHA mine 4801164

Current hierarchy: **Meredith  Reiter → Empire Sand & Gravel Company Inc → Milford 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

- **controller_controls_mine:** Meredith  Reiter → Milford Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Lander Ready-Mix Inc → Milford Pit; 1950-01-01 to 1981-11-15; source msha-controller-operator-history
- **controller_controls_mine:** Brad  Hulme et al → Milford Pit; 1950-01-01 to 1981-11-15; source msha-controller-operator-history
- **controller_controls_operator:** Brad  Hulme et al → Lander Ready-Mix Inc; 1950-01-01 to 1981-11-15; source msha-controller-operator-history
- **operator_operates_mine:** Empire Sand & Gravel Company Inc → Milford Pit; 1981-11-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Meredith  Reiter → Empire Sand & Gravel Company Inc; 1981-11-16 to current/open; source msha-controller-operator-history