# Relationship history for MSHA mine 4300761

Current hierarchy: **Cheryl A  Harvey; Raymond C  Harvey → Harveys Plumbing and Excavating → Severy's Pit**

- 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

- **controller_controls_mine:** Cheryl A  Harvey et al → Severy's Pit; 1990-11-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Harveys Plumbing and Excavating → Severy's Pit; 2014-02-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cheryl A  Harvey et al → Harveys Plumbing and Excavating; 2014-02-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Raymond C  Harvey et al → Harveys Plumbing and Excavating; 2014-02-12 to current/open; source msha-controller-operator-history