# Relationship history for MSHA mine 4406969

Current hierarchy: **Metinvest B V → Hokie Mining Company → Nora Contour**

- 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:** Kenneth L  Stacy → Nora Contour; 1988-08-24 to 2006-03-22; source msha-controller-operator-history
- **operator_operates_mine:** Hokie Mining Company → Nora Contour; 1999-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kenneth L  Stacy → Hokie Mining Company; 1999-11-01 to 2006-03-22; source msha-controller-operator-history
- **controller_controls_mine:** United  Company → Nora Contour; 2006-03-23 to 2009-04-29; source msha-controller-operator-history
- **controller_controls_operator:** United  Company → Hokie Mining Company; 2006-03-23 to 2009-04-29; source msha-controller-operator-history
- **controller_controls_mine:** Metinvest B V → Nora Contour; 2009-04-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Metinvest B V → Hokie Mining Company; 2009-04-30 to current/open; source msha-controller-operator-history