# Relationship history for MSHA mine 1700838

Current hierarchy: **Margaret  Lee → Emery Lee & Sons Inc → Lee's Readi Mix**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** James B Lee → Lee's Readi Mix; 2008-07-17 to 2018-12-31; source msha-controller-operator-history
- **controller_controls_mine:** James B  Lee → Lee's Readi Mix; 2008-07-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James B  Lee → James B Lee; 2008-07-17 to 2018-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Emery Lee & Sons Inc → Lee's Readi Mix; 2019-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Margaret  Lee → Lee's Readi Mix; 2019-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Margaret  Lee → Emery Lee & Sons Inc; 2019-01-01 to current/open; source msha-controller-operator-history