# Relationship history for MSHA mine 1701209

Current hierarchy: **Holly  Whitmore; Richard  Whitmore → Whitmore Contracting, Inc → Hampden 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Richard  Whitmore et al → Hampden Quarry; 2020-04-18 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Whitmore Contracting, Inc → Hampden Quarry; 2026-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard  Whitmore et al → Whitmore Contracting, Inc; 2026-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Holly  Whitmore et al → Whitmore Contracting, Inc; 2026-10-01 to current/open; source msha-controller-operator-history