# Relationship history for MSHA mine 4701275

Current hierarchy: **Charles  Plummer; David  Courtney Jr → Friedrich Loots & Below Inc → Sheppard Quarry**

- 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:** Friedrich Loots & Below Inc → Sheppard Quarry; 1950-01-01 to 1984-07-18; source msha-controller-operator-history
- **controller_controls_mine:** Loots Ralph → Sheppard Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Loots Ralph → Friedrich Loots & Below Inc; 1950-01-01 to 1984-07-18; source msha-controller-operator-history
- **operator_operates_mine:** Friedrich Loots & Below Inc → Sheppard Quarry; 1984-07-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Charles  Plummer  et al → Sheppard Quarry; 1984-07-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Charles  Plummer  et al → Friedrich Loots & Below Inc; 1984-07-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David  Courtney Jr  et al → Friedrich Loots & Below Inc; 1984-07-19 to current/open; source msha-controller-operator-history