# Relationship history for MSHA mine 4000128

Current hierarchy: **Pittenger Frank H & Patsy H → Caryville Sand Company → Caryville Sand Company**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Concrete Supply Company → Caryville Sand Company; 1950-01-01 to 1983-07-20; source msha-controller-operator-history
- **controller_controls_mine:** Pittenger Gaines S-William B Sansom Et Al → Caryville Sand Company; 1950-01-01 to 1983-07-20; source msha-controller-operator-history
- **controller_controls_operator:** Pittenger Gaines S-William B Sansom Et Al → Concrete Supply Company; 1950-01-01 to 1983-07-20; source msha-controller-operator-history
- **operator_operates_mine:** Caryville Sand Company → Caryville Sand Company; 1983-07-21 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Pittenger Frank H & Patsy H → Caryville Sand Company; 1983-07-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pittenger Frank H & Patsy H → Caryville Sand Company; 1983-07-21 to current/open; source msha-controller-operator-history