# Relationship history for MSHA mine 2003456

Current hierarchy: **James  Lester; William  Lester → Lester Brothers Inc. → Portable Plant #3 (Teesab)**

- 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

- **controller_controls_mine:** William  Lester et al → Portable Plant #3 (Teesab); 2002-07-15 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Lester Brothers Inc. → Portable Plant #3 (Teesab); 2012-04-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William  Lester et al → Lester Brothers Inc.; 2012-04-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James  Lester et al → Lester Brothers Inc.; 2012-04-05 to current/open; source msha-controller-operator-history