# Relationship history for MSHA mine 1401650

Current hierarchy: **Micheal W  Higgins; Micheal K  Higgins → Higgins Stone Inc → Higgins Stone Inc**

- 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:** Higgins Stone Inc → Higgins Stone Inc; 2005-10-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Micheal W  Higgins et al → Higgins Stone Inc; 2005-10-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Micheal W  Higgins et al → Higgins Stone Inc; 2005-10-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Micheal K  Higgins et al → Higgins Stone Inc; 2005-10-17 to current/open; source msha-controller-operator-history