# Relationship history for MSHA mine 2200816

Current hierarchy: **William W  Blain; Robert Lee  Stevens → Magnolia Frac Sand LLC → Natchez**

- 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:** Magnolia Frac Sand LLC → Natchez; 2014-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** William W  Blain et al → Natchez; 2014-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William W  Blain et al → Magnolia Frac Sand LLC; 2014-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert Lee  Stevens et al → Magnolia Frac Sand LLC; 2014-04-01 to current/open; source msha-controller-operator-history