# Relationship history for MSHA mine 3503654

Current hierarchy: **Donald M  Laskey → Laskey-Clifton Corporation → LC-200**

- 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:** Donald M  Laskey → LC-200; 2001-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Laskey-Clifton Corporation → LC-200; 2006-10-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Donald M  Laskey → Laskey-Clifton Corporation; 2006-10-16 to current/open; source msha-controller-operator-history