# Relationship history for MSHA mine 0301551

Current hierarchy: **Brad  Smith → Malvern Minerals Company → Malvern Minerals Sandstone Quarry South**

- 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

- **controller_controls_mine:** Brad  Smith → Malvern Minerals Sandstone Quarry South; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Malvern Minerals Company → Malvern Minerals Sandstone Quarry South; 1983-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brad  Smith → Malvern Minerals Company; 1983-05-01 to current/open; source msha-controller-operator-history