# Relationship history for MSHA mine 2003438

Current hierarchy: **James  Lester; William  Lester → LESTER BROTHERS EXCAVATION, INC → CALLS PIT**

- 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

- **controller_controls_mine:** James  Lester et al → CALLS PIT; 2002-07-15 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** LESTER BROTHERS EXCAVATION, INC → CALLS PIT; 2009-12-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James  Lester et al → LESTER BROTHERS EXCAVATION, INC; 2009-12-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William  Lester et al → LESTER BROTHERS EXCAVATION, INC; 2009-12-14 to current/open; source msha-controller-operator-history