# Relationship history for MSHA mine 1401286

Current hierarchy: **Hoskinson Richard D → Central Sand Inc → Central Sand Incorporated**

- 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:** Central Sand Inc → Central Sand Incorporated; 1978-03-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hoskinson Richard D → Central Sand Incorporated; 1978-03-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hoskinson Richard D → Central Sand Inc; 1978-03-09 to current/open; source msha-controller-operator-history