# Relationship history for MSHA mine 2700448

Current hierarchy: **All States Materials Group → Mitchell Materials, LLC. → Mitchell Materials- Winchester**

- 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:** Mitchell Sand & Gravel LLC → Mitchell Materials- Winchester; 2010-09-01 to 2019-11-24; source msha-controller-operator-history
- **controller_controls_mine:** Robert V  Mitchell Jr → Mitchell Materials- Winchester; 2010-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert V  Mitchell Jr → Mitchell Sand & Gravel LLC; 2010-09-01 to 2019-11-24; source msha-controller-operator-history
- **operator_operates_mine:** Mitchell Materials, LLC. → Mitchell Materials- Winchester; 2019-11-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** All States Materials Group → Mitchell Materials- Winchester; 2019-12-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** All States Materials Group → Mitchell Materials, LLC.; 2019-12-30 to current/open; source msha-controller-operator-history