# Relationship history for MSHA mine 1401313

Current hierarchy: **Grant  Stannard → Allied Inc → Hillie 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:** Ronald C  Siebert → Hillie Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Grant  Stannard → Hillie Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Siebert Sand Company Inc → Hillie Pit; 1979-01-01 to 1985-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Ronald C  Siebert → Siebert Sand Company Inc; 1979-01-01 to 1985-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Allied Inc → Hillie Pit; 1985-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Grant  Stannard → Allied Inc; 1985-07-01 to current/open; source msha-controller-operator-history