# Relationship history for MSHA mine 1900045

Current hierarchy: **All States Materials Group → Trew Stone, LLC → East Deerfield Quarry**

- 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:** Trew Corp → East Deerfield Quarry; 1950-01-01 to 2006-03-24; source msha-controller-operator-history
- **controller_controls_mine:** WTD Corp → East Deerfield Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** WTD Corp → Trew Corp; 1950-01-01 to 2006-03-24; source msha-controller-operator-history
- **operator_operates_mine:** Trew Stone, LLC → East Deerfield Quarry; 2006-03-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** All States Materials Group → East Deerfield Quarry; 2006-03-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** All States Materials Group → Trew Stone, LLC; 2006-03-25 to current/open; source msha-controller-operator-history